Positioning and clamping device for inclined deep hole machining

Abstract

The utility model relates to oil hole processing technical field, and disclose a kind of positioning clamping device for oblique deep hole processing, including bottom plate, positioning plate, inclined hole drilling template, left inclined support, right inclined support, two angle seats, double head screw rod, nut, at least two threaded positioning pins, at least four bushings and drill bushing;The bottom plate is positioned and fastened on the upper surface of bottom plate by screw and pin, respectively, with left inclined support, right inclined support and two angle seats.The positioning plate two sides inner hole each installs a bushing, and the bushing inner hole is matched with the outer circle light surface of threaded positioning pin.The utility model can omit the step of angle workbench returning to level and then shaking to target angle when replacing parts each time, and the parts do not need to repeat alignment, greatly simplify operation process;Positioning and fastening function are integrated in positioning plate, and the device structure is compact, and part is convenient to assemble and disassemble, reduces manual operation error, improves production efficiency and product quality stability.

Description

Technical Field

[0001] This utility model relates to the field of oil hole processing technology, specifically a positioning and clamping device for machining inclined deep holes. Background Technology

[0002] A hydraulic control oil hole needs to be machined between the bottom of the pipe thread hole and the annular groove of a certain marine engine PTO flange in order to realize the displacement control of the PTO flange on the PTO shaft / sleeve. The difficulties in machining the oil hole are: 1. The angle between the oil hole axis and the center axis of the PTO flange part is 20.87°, which is an inclined hole machining, requiring high accuracy in angle and position; 2. The oil hole opening is located at the center of the bottom surface of a pipe thread hole in the Y+ direction on the PTO flange. Therefore, when machining the oil hole, the part must be aligned first so that the pipe thread hole is in the Y+ direction of the machine tool. If there is a large deviation in alignment, the oil hole opening and outlet position will be out of tolerance, resulting in the scrapping of the entire PTO flange part; 3. There is a concentricity requirement between the oil hole opening and the bottom center of the pipe thread hole. The oil hole axis forms an angle of 69.13° with the bottom surface of the pipe thread hole. That is, the drill bit and the bottom surface of the pipe thread hole also form an angle of 69.13° during machining. This requires solving the problem of inaccurate oil hole opening position caused by the drift of the drill tip on the inclined surface during drill machining. Otherwise, the concentricity requirement between the oil hole opening and the bottom center of the pipe thread hole cannot be guaranteed.

[0003] The original method involved using a commercially available angle table. After placing the PTO flange part on the angle table, the bottom hole of the pipe thread on the PTO flange part was first aligned to the Y+ position. Then, the PTO flange part was tightened onto the angle table. The machining center then drilled a 2mm deep sample point on the bottom surface of the pipe thread hole on the PTO flange part according to the program (because the machine tool cannot find the center coordinates of the part when the PTO flange part is tilted, the sample point can only be drilled when the PTO flange part is placed horizontally). The angle table was then manually rotated to the required tilt angle. The machining center spindle drill bit was then manually operated, and the drill tip was visually observed to fall on the sample point. The required oil hole was then machined according to the program. However, because the step of aligning the drill tip with the sample point was done by manual visual observation, even when using a flashlight to illuminate the pipe thread hole, deviations were easily made during observation. At the same time, the minimum adjustable accuracy of the angle table itself was 1°, which could not meet the 20.87° included angle accuracy required by the part. In addition, the screw clearance problem of the angle table caused the inlet position of the machined oil hole to be unstable, and the outlet position was even more prone to exceeding the tolerance. At the same time, every time parts are replaced, the angle worktable needs to be returned to the horizontal position, the parts need to be re-aligned, the parts need to be tightened, and then the angle worktable needs to be rotated to the required tilt angle. This is labor-intensive and time-consuming. In addition, manual alignment of parts and rotation of the worktable tilt angle are prone to errors, which can lead to oil hole positions being out of tolerance, and thus the parts will be scrapped.

[0004] In view of this, we propose a positioning and clamping device for machining inclined deep holes. Utility Model Content

[0005] The purpose of this invention is to provide a positioning and clamping device for machining inclined deep holes, which solves the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a positioning and clamping device for machining inclined deep holes, comprising a base plate, a positioning plate, an inclined hole drilling template, a left inclined support, a right inclined support, two angle seats, a double-ended screw, a nut, at least two threaded positioning pins, at least four bushings, and a drill bushing; the left inclined support, the right inclined support, and the two angle seats are positioned and fastened to the upper surface of the base plate by screws and pins.

[0007] Preferably, a bushing is installed in the inner hole on each side of the positioning plate. The inner hole of the bushing is engaged with the outer round smooth surface of the threaded positioning pin. The threaded head of the threaded positioning pin is used to connect and fasten with the corresponding threaded hole of the PTO flange to be processed.

[0008] Preferably, the positioning plate has an oblique hole in the middle, in which a double-ended screw is installed. The upper external thread of the double-ended screw engages with a nut, and the lower external thread is used to pass through the waist hole of the base plate and connect with the T-nut of the worktable below.

[0009] Preferably, a bushing is installed on each of the inner holes on both sides of the inclined hole drilling template. The inner hole of the bushing mates with the outer smooth surface of the threaded locating pin. The threaded head of the threaded locating pin is used to connect and fasten with the corresponding threaded hole of the PTO flange.

[0010] Preferably, the inclined hole drilling template has an inclined hole in the middle, and a drill sleeve is installed in the inclined hole.

[0011] Preferably, the angle formed by the inclined surfaces of the two angle seats and the upper surface of the base plate is consistent with the angle between the inclined oil hole axis of the PTO flange and the central axis of the PTO flange.

[0012] Preferably, the inclination angle of the inclined hole in the middle of the positioning plate and the inclination angle of the inclined hole drilling template are both consistent with the inclination angle of the oil hole of the PTO flange.

[0013] Preferably, the two sides of the positioning plate are in contact with the inclined surfaces of the left and right inclined supports, respectively, and the bottom surface of the PTO flange is in contact with the inclined surfaces of the two angle seats.

[0014] This invention provides a positioning and clamping device for machining inclined deep holes. This positioning and clamping device for machining inclined deep holes has the following advantages: (1) The 20.87° precise inclined surface of the angle seat in this utility model can ensure that the oil hole tilt angle meets the processing requirements; the drill sleeve on the inclined hole drill template is positioned to ensure the concentricity of the oil hole opening and the bottom center of the PTO flange pipe thread hole; the positioning plate and the left and right inclined supports are positioned together to directly ensure the Y+ orientation of the pipe thread hole after the parts are replaced, without repeated alignment, thus avoiding positional deviation.

[0015] (2) This utility model can eliminate the step of returning the angle worktable to the horizontal and then shaking it to the target angle each time the parts are changed, and the parts do not need to be repeatedly aligned, which greatly simplifies the operation process; the positioning and fastening functions are integrated into the positioning plate, the device has a compact structure, the parts are easy to load and unload, reduce manual operation errors, and improve production efficiency and product quality stability. Attached Figure Description

[0016] Figure 1 This is an exploded structural diagram of a positioning and clamping device for machining inclined deep holes according to the present invention. Figure 2 This is a schematic diagram of the installation structure of a positioning and clamping device for inclined deep hole machining and a PTO flange according to the present invention. Figure 3 This is a cross-sectional structural diagram of the positioning and clamping device for machining inclined deep holes according to this utility model.

[0017] In the figure: 1-Threaded locating pin, 2-Angled hole drilling template, 21-Bushing, 22-Drill bushing, 3-Location plate, 4-Left inclined support, 5-Right inclined support, 6-Angle seat, 7-Double-ended screw, 71-Nut, 8-Base plate, 9-PTO flange, 10-Drilling machine spindle and drill bit. Detailed Implementation

[0018] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described with reference to the accompanying drawings.

[0019] A preferred embodiment of the positioning and clamping device for inclined deep hole machining provided by this utility model is, for example... Figures 1 to 3As shown: A device for machining inclined deep holes includes a base plate 8. A left inclined support 4, a right inclined support 5, and two angle seats 6 are respectively positioned and fastened to the upper surface of the base plate 8 by screws and pins, forming a support structure for positioning and determining the inclination angle. A bushing 21 is installed in the inner hole on each side of the positioning plate 3. The inner hole of the bushing 21 mates with the outer smooth surface of the threaded positioning pin 1. The threaded head of the threaded positioning pin 1 is connected and fastened to the corresponding threaded hole of the PTO flange 9. The inclined hole in the middle of the positioning plate 3 is... The device is equipped with a double-ended screw 7. The upper external thread of the double-ended screw 7 is screwed into the nut 71, and the lower external thread passes through the waist hole of the base plate 8 and connects to the T-nut of the workbench below. In this way, the PTO flange 9 is positioned and fastened to the two angle seats 6. A bushing 21 is installed in the inner hole on each side of the inclined hole drilling template 2. The inner hole of the bushing 21 is matched with the outer smooth surface of the threaded positioning pin 1. The threaded head of the threaded positioning pin 1 is connected and fastened to the corresponding threaded hole of the PTO flange 9. A drill sleeve 2 is installed in the inclined hole in the middle of the inclined hole drilling template 2.

[0020] Working principle: First, use two threaded locating pins 1 to connect and fasten the corresponding threaded holes of the locating plate 3 and the PTO flange 9. Then, use a special lifting ring to lift it onto the inclined surface of the two angle seats 6. The bottom surface of the PTO flange 9 contacts the inclined surface of the two angle seats 6, and the two sides of the locating plate 3 contact the inclined surfaces of the left inclined support 4 and the right inclined support 5. In this way, the freedom of the PTO flange 9 in the left, right, front, back, rotation and up and down directions is fixed. At the same time, the inclined oil hole of the PTO flange 9 is in the vertical direction. Insert the double-ended screw 7 into the central inclined hole of the locating plate 3. The external thread of the lower end of the double-ended screw 7 passes through the waist hole of the base plate 8 and connects with the T-nut of the lower worktable. After tightening the nut 71 with the external thread of the upper end of the double-ended screw 7, the PTO flange 9 is fastened in the device.

[0021] Two threaded locating pins 1 are used to connect and fasten the slanted hole drill template 2 to the corresponding threaded holes of the PTO flange 9. The hole position of the drill sleeve 22 on the slanted hole drill template 2 is the position of the inclined oil hole in the PTO flange 9. At this time, the drill spindle and drill bit 10 are aligned with the drill sleeve 22 and drilled vertically to process the pre-drilled hole of the inclined oil hole.

[0022] After the pre-drilled holes are completed, remove the two threaded locating pins 1 on the inclined hole drilling template 2, remove the inclined hole drilling template 2, and use φ5 and φ3 drill bits with different length-to-diameter ratios to process the inclined oil holes that meet the requirements.

[0023] After processing, loosen nut 71 and unscrew the double-ended screw 7 from the T-nut on the workbench. Then, use a special lifting eye to lift the entire assembly of PTO flange 9 and positioning plate 3 out (the threaded head of the lifting eye is screwed into the corresponding threaded hole of PTO flange 9. When lifting, the static balance angle of the assembly is basically consistent with the inclined surface of angle seat 6, so there is no interference problem between PTO flange and inclined deep hole processing device when lifting). Then remove the two threaded positioning pins 1 on positioning plate 3, and finally remove positioning plate 3 and move on to the installation and processing of the next PTO flange.

[0024] Compared to the previous process, the entire processing not only ensures processing quality but also eliminates the tedious steps of aligning parts and rotating the worktable, thus avoiding the probability of errors in manual alignment and worktable rotation, as well as the probability of errors in manually visually aligning the drill tip with the sample point. This reduces production costs, lightens the workload of workers, and improves production efficiency and product quality.

[0025] The above description is merely an illustrative embodiment of this utility model and is not intended to limit the scope of this utility model. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of this utility model should fall within the protection scope of this utility model. Furthermore, it should be noted that the components of this utility model are not limited to the overall application described above. Each technical feature described in the specification of this utility model can be used individually or in combination as needed. Therefore, this utility model naturally covers other combinations and specific applications related to the points of this utility model.

Claims

1. A positioning and clamping device for machining inclined deep holes, characterized in that, It includes a base plate (8), a positioning plate (3), a slanted hole drilling template (2), a left slanted support (4), a right slanted support (5), two angle seats (6), a double-ended screw (7), a nut (71), at least two threaded positioning pins (1), at least four bushings (21) and a drill bushing (22); the left slanted support (4), the right slanted support (5) and the two angle seats (6) are positioned and fastened to the upper surface of the base plate (8) by screws and pins.

2. The positioning and clamping device for machining inclined deep holes according to claim 1, characterized in that, A bushing (21) is installed on each of the inner holes on both sides of the positioning plate (3). The inner hole of the bushing (21) is fitted with the outer round smooth surface of the threaded positioning pin (1). The threaded head of the threaded positioning pin (1) is used to connect and fasten with the corresponding threaded hole of the PTO flange (9) to be processed.

3. The positioning and clamping device for machining inclined deep holes according to claim 1, characterized in that, The positioning plate (3) has an oblique hole in the middle, and a double-ended screw (7) is installed in the oblique hole. The upper external thread of the double-ended screw (7) is screwed into the nut (71), and the lower external thread is used to pass through the waist hole of the base plate (8) and connect with the T-shaped nut of the workbench below.

4. A positioning and clamping device for machining inclined deep holes according to claim 1, characterized in that, A bushing (21) is installed on each of the inner holes on both sides of the inclined hole drilling template (2). The inner hole of the bushing (21) is fitted with the outer round smooth surface of the threaded positioning pin (1). The threaded head of the threaded positioning pin (1) is used to connect and fasten with the corresponding threaded hole of the PTO flange (9).

5. A positioning and clamping device for machining inclined deep holes according to claim 1, characterized in that, The inclined hole drilling template (2) has an inclined hole in the middle, and a drill sleeve (22) is installed in the inclined hole.

6. A positioning and clamping device for machining inclined deep holes according to claim 1, characterized in that, The angle formed by the inclined surface of the two angle seats (6) and the upper surface of the base plate (8) is consistent with the angle between the inclined oil hole axis of the PTO flange (9) and the central axis of the PTO flange (9).

7. A positioning and clamping device for machining inclined deep holes according to claim 1, characterized in that, The inclination angle of the inclined hole in the middle of the positioning plate (3) and the inclination angle of the inclined hole drill template (2) are both consistent with the inclination angle of the oil hole of the PTO flange (9).

8. A positioning and clamping device for machining inclined deep holes according to claim 1, characterized in that, The two sides of the positioning plate (3) are in contact with the inclined surfaces of the left inclined support (4) and the right inclined support (5) respectively, and the bottom surface of the PTO flange (9) is in contact with the inclined surfaces of the two angle seats (6).

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