Center correcting device

Abstract

The utility model belongs to the technical field of cutting machining, and particularly relates to a center correcting device. The utility model provides a center correcting device which comprises a shell, a center body and a correcting disc. The shell comprises a disc-shaped front cover and a limiting ring, and the front end of the limiting ring is fixed to the rear end of the front cover. And a tip body is arranged at the front end of the front cover. A correction disc is movably installed in the limiting ring, and the outer diameter of the correction disc is smaller than the inner diameter of the limiting ring. A set of positioning holes are formed in the circumferential side of the limiting ring around the rotating axis in an annular array mode, the axis direction of the positioning holes coincides with the radial direction of the limiting ring, and an adjusting bolt is arranged in each positioning hole. A set of positioning grooves are formed in the peripheral side of the correction disc in the axis extending direction of the positioning holes, and the sections of the positioning grooves are larger than those of the positioning holes. The adjusting bolt penetrates through the positioning hole and abuts against the positioning groove.

Description

Technical Field

[0001] The utility model belongs to the technical field of cutting processing, and particularly relates to a center point correction device. Background Art

[0002] In the mechanical processing industry, due to the shape characteristics and usage requirements of shaft parts, high-precision processing is usually required during manufacturing to ensure their performance. The traditional processing method for shaft parts mainly relies on center hole positioning, that is, center holes are pre-machined at both ends of the part to facilitate precise positioning of the part through tools such as center points in subsequent processing by mating with these center holes.

[0003] However, in actual production, due to the accuracy limitations of processing equipment or differences in the technical levels of operators, the positions of the center holes may also deviate from the axis, resulting in inaccurate positioning of the part during processing. The position deviation of the center hole will cause problems such as workpiece vibration, increased tool wear, decreased machining surface quality, and the accuracy of the final product not meeting the requirements during the processing process. Moreover, once there is a large deviation in the center hole, traditional processing methods are often difficult to correct, thus affecting the efficiency and cost of the entire processing process.

[0004] In addition, for some special-shaped crankshaft parts, there may be no machining position for the center hole that is consistent with the rotation axis at the end. Summary of the Utility Model

[0005] Aiming at the deficiencies of the existing technology, the utility model provides a center point correction device. For shaft parts with a deviation between the center hole and the rotation axis, the center point correction device can be used to adjust the axis of the workpiece to ensure that the workpiece can be normally processed and improve the machining accuracy.

[0006] The center point correction device provided by the utility model includes a housing, a center point body, and a correction disk. The housing includes a disk-shaped front cover and a limit ring, and the front end of the limit ring is fixed to the rear end of the front cover. The center point body is axially installed at the front end of the front cover. The correction disk is movably installed within the limit ring, and the outer diameter of the correction disk is smaller than the inner diameter of the limit ring. On the circumferential side of the limit ring, a set of positioning holes are annularly arranged around the rotation axis, and the axial direction of the positioning holes coincides with the radial direction of the limit ring. An adjusting bolt is provided in each positioning hole. On the circumferential side of the correction disk, positioning grooves are provided along the extending direction of the axis of each positioning hole, and the cross-section of the positioning groove is larger than the cross-section of the positioning hole. The adjusting bolt passes through the positioning hole and abuts against the positioning groove.

[0007] The center alignment device provided by the present utility model is applicable to the scenario of precision machining of shaft parts. The workpiece is placed between the center positioning device provided by the present utility model and the tailstock center. The center body and the tailstock center are respectively aligned with and pressed against the center of the workpiece, and the calibration disc is installed on the machine tool chuck. By controlling the screwing depth of the adjusting bolt, the relative position between the calibration disc and the housing can be adjusted. Since the calibration disc is installed on the chuck and always remains in a fixed position, the housing generates a relative displacement relative to the calibration disc, causing the center body to drive the workpiece to move, thereby adjusting the axis position of the workpiece.

[0008] Further, the width of the bottom of the positioning groove is smaller than the width of the notch, and the cross-section is trapezoidal. The inclined surface of the positioning groove can facilitate the installation of the adjusting bolt. When screwing in the adjusting bolt, the adjusting bolt only needs to be screwed in along the inclined surface of the trapezoidal structure.

[0009] Further, on the rear end face of the front cover, a set of positioning bosses is arranged in a circumferential array around the rotation axis. The positioning bosses are cylindrical, with one end fixed to the front cover and the other end abutted against the calibration disc. The positioning bosses can limit the axial displacement of the front cover and ensure that the calibration disc is parallel to the front cover.

[0010] Further, a first mounting hole is provided in the center of the calibration disc. The first mounting hole is arranged axially and penetrates the calibration disc. Near the first mounting hole, a set of second mounting holes is arranged in a circumferential array around the axis. The second mounting holes are arranged axially and penetrate the calibration disc. The calibration disc can be connected to the machine tool spindle or chuck by selecting the first mounting hole and / or the second mounting hole according to the actual installation scenario.

[0011] Further, the adjusting bolt has an external thread, and the positioning hole has an internal thread. The adjusting bolt is in threaded engagement with the positioning hole. The meshing of the threads forms a tight and firm connection between the adjusting nut and the positioning hole, preventing the adjusting bolt from loosening and ensuring the calibration accuracy.

[0012] Further, the front end of the center body is a flat end face, and the taper of the center body is preferably 1:4.

[0013] Further, the rear end of the center body is welded and fixed to the center of the front end of the front cover. The fixed connection between the center body and the front cover can effectively reduce the relative movement between the center body and the front cover, prevent the center body from loosening, and ensure the positioning accuracy of the center body. In addition, the rear end of the center body can also be installed in the center of the front end of the front cover in a detachable manner. Description of the Drawings

[0014] Figure 1 is a schematic structural diagram of the center alignment device;

[0015] Figure 2 is a schematic structural diagram of the housing;

[0016] Figure 3It is a schematic structural diagram of a calibration disk.

[0017] In the figure: 1. Housing; 2. Center body; 3. Calibration disk; 11. Front cover; 12. Limit ring; 31. Positioning groove; 32. First mounting hole; 33. Second mounting hole; 111. Positioning boss; 121. Positioning hole; 122. Adjusting bolt. Specific implementation manner

[0018] Embodiment 1

[0019] As Figure 1 、 Figure 2 、 Figure 3 shown, the center calibration device provided in this embodiment includes a housing 1, a center body 2 and a calibration disk 3. The housing 1 includes a disk-shaped front cover 11 and a limit ring 12, and the front end of the limit ring 12 is fixed to the rear end of the front cover 11. A center body 2 is axially mounted at the front end of the front cover 11. A calibration disk 3 is movably mounted within the limit ring 12, and the outer diameter of the calibration disk 3 is smaller than the inner diameter of the limit ring 12. On the circumferential side of the limit ring 12, a set of positioning holes 121 are arranged in a circular array around the rotation axis, the axial direction of the positioning holes 121 coincides with the radial direction of the limit ring 12, and an adjusting bolt 122 is arranged in each positioning hole 121. On the circumferential side of the calibration disk 3, positioning grooves 31 are arranged along the extending direction of the axis of each positioning hole 121, and the cross-section of the positioning grooves 31 is larger than that of the positioning holes 121. The adjusting bolt 122 passes through the positioning hole 121 and abuts against the positioning groove 31.

[0020] During use, the workpiece is clamped between the center positioning device and the tailstock center. The center body 2 and the tailstock center are respectively aligned with and pressed against the center of the workpiece. The calibration disk 3 is mounted on the machine tool chuck. By controlling the screwing depth of the adjusting bolts 122 in different directions, the relative position between the calibration disk 3 and the housing 1 can be adjusted. Since the calibration disk 3 is mounted on the chuck and always remains in a fixed position, the housing 1 generates a relative displacement relative to the calibration disk 3, causing the center body 2 to drive the workpiece to move, thereby adjusting the axis position of the workpiece to meet the process requirements of machining.

[0021] As Figure 3 shown, the bottom width of the positioning groove 31 is smaller than the groove opening width, and the cross-section is trapezoidal. The inclined surface of the positioning groove 31 can facilitate the installation of the adjusting bolt 122. When screwing in the adjusting bolt 122, even if the angle of the calibration disk 3 is slightly deviated, the adjusting bolt 122 can be screwed in along the inclined surface of the trapezoidal groove.

[0022] As Figure 2As shown in the figure, on the rear end face of the front cover 11, a group of positioning bosses 111 are arranged in an annular array around the rotation axis. The positioning bosses 111 are cylindrical. One end is fixed on the front cover 11, and the other end abuts against the calibration disk 3. The positioning bosses 111 can limit the axial displacement of the front cover 11 and ensure that the calibration disk 3 is parallel to the front cover 11.

[0023] As Figure 3 shown in the figure, a first mounting hole 32 is provided in the center of the calibration disk 3. The first mounting hole 32 is arranged axially and penetrates through the calibration disk 3. Through the first mounting hole 32, the calibration disk 3 can be connected to the spindle of the machine tool chuck, the front cover 11 can be tightened against the spindle of the machine tool chuck, and a forward pressure can be applied to the tip body 2 through the spindle.

[0024] As Figure 3 shown in the figure, near the first mounting hole 32, a group of second mounting holes 33 are arranged in an annular array around the axis. The second mounting holes 33 are arranged axially and penetrate through the calibration disk 3. Through the second mounting holes 33, the calibration disk 3 can be connected to the machine tool chuck screw, providing a stable connection structure, fixing the position of the calibration disk 3, preventing the calibration disk 3 from shifting, and facilitating assembly and disassembly at the same time.

[0025] In this embodiment, the adjusting bolt 122 has an external thread, and the positioning hole 121 has an internal thread. The adjusting bolt 122 is in threaded engagement with the positioning hole 121. The meshing of the threads forms a tight and firm connection between the adjusting nut and the positioning hole 121, preventing the adjusting bolt 122 from loosening and ensuring the calibration accuracy.

[0026] In this embodiment, the front end of the tip body 2 is a flat end face, and a chamfer is formed around the end face to improve the safety of the tip body 2 during use. Preferably, the taper of the tip body 2 is 1:4.

[0027] In this embodiment, the rear end of the tip body 2 is welded and fixed to the center of the front end of the front cover 11. The tip body 2 is fixedly connected to the front cover 11 to prevent the tip body 2 from loosening and ensure the positioning accuracy of the tip body 2. In other embodiments, the rear end of the tip body 2 can also be installed in a detachable manner, such as by clamping or bolt connection, etc., at the center of the front end of the front cover 11, so as to facilitate replacing the tip body 2 with a suitable shape and size according to different shaft-like workpieces.

[0028] The above embodiments are exemplary, and their purpose is to illustrate the technical concept and characteristics of this embodiment, so that those skilled in this field can understand the content of this embodiment and implement it accordingly, and it cannot be used to limit the protection scope of this embodiment. Any equivalent changes or modifications made according to the spirit and essence of this embodiment should be covered within the protection scope of this embodiment.

Claims

1. A top calibration device, characterized in that: The invention comprises a housing (1), a top body (2) and a correction disk (3); the housing (1) comprises a disk-shaped front cover (11) and a limiting ring (12), the front end of the limiting ring (12) being fixed to the rear end of the front cover (11); the top body (2) is axially mounted at the front end of the front cover (11); the correction disk (3) is movably mounted in the limiting ring (12), the outer diameter of the correction disk (3) being smaller than the inner diameter of the limiting ring (12); and a ring-shaped outer diameter (2) is formed on the circumference of the limiting ring (12) around the rotation axis. A group of positioning holes (121) are arranged in an array, the axial direction of the positioning holes (121) coincides with the radial direction of the limiting ring (12), and an adjusting bolt (122) is arranged in each positioning hole (121); a positioning groove (31) is arranged on the circumferential side of the correction disk (3) along the axial extension direction of each positioning hole (121), and the cross section of the positioning groove (31) is larger than the cross section of the positioning hole (121); and the adjusting bolt (122) passes through the positioning hole (121) and abuts against the positioning groove (31).

2. The top correction device according to claim 1, characterized in that: The bottom width of the positioning groove (31) is smaller than the groove opening width, and the cross section is trapezoidal.

3. The top correction device according to claim 1, characterized in that: A group of positioning bosses (111) are arranged in a circular array around the rotation axis on the rear end surface of the front cover (11); the positioning bosses (111) are cylindrical, one end of which is fixed to the front cover (11) and the other end of which is in contact with the correction disk (3).

4. The top correction device according to claim 1, characterized in that: A first mounting hole (32) is provided at the centre of the correction disk (3); the first mounting hole (32) is arranged along the axial direction and passes through the correction disk (3).

5. The top correction device according to claim 4, characterized in that: A group of second mounting holes (33) are arranged in a circular array around the axis near the first mounting hole (32); the second mounting holes (33) are arranged along the axial direction and penetrate the correction disk (3).

6. The top correction device according to claim 1, characterized in that: The adjusting bolt (122) has an external thread, the positioning hole (121) has an internal thread, and the adjusting bolt (122) and the positioning hole (121) are threadably matched.

7. The top correction device according to claim 1, characterized in that: The front end of the top body (2) is a flat end surface.

8. The top correction device according to claim 1, characterized in that: The taper of the top body (2) is 1:

4.

9. The top correction device according to claim 1, characterized in that: The rear end of the top body (2) is detachably mounted at the front center of the front cover (11).

10. The top correction device according to claim 1, characterized in that: The rear end of the top body (2) is welded and fixed to the center of the front end of the front cover (11).

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