Floating clamping mechanism for hole honing

Abstract

The utility model discloses a floating clamping mechanism for hole honing, and belongs to the field of machining equipment. The mechanism is used for the hole honing machine tool and comprises a connecting bottom plate, an axial adjusting device, a U-shaped seat, a radial adjusting assembly, a rotary clamping device and a first air cylinder, and the connecting bottom plate is connected with the bottom of a reciprocating seat of the hole honing machine tool; the axial adjusting device is fixed on the connecting bottom plate; the bottom of the U-shaped seat is connected with the top end of the axial adjusting device; the radial adjusting assemblies are arranged on the two sides of the U-shaped base. The rotary clamping device comprises a lower clamping part pivoted with the U-shaped seat and an upper clamping part rotationally connected with one end of the lower clamping part, and the two ends of the lower clamping part are in threaded connection with the radial adjusting assembly; the first air cylinder is fixed to the top of the upper clamping part and located at the end away from the rotating connecting position of the upper clamping part and the lower clamping part. The abrasive belt clamping device is used for solving the problems that in the prior art, a traditional abrasive belt is poor in clamping applicability, insufficient in positioning accuracy, inconvenient to adjust and weak in clamping stability.

Description

Technical Field

[0001] This utility model relates to the field of processing equipment, and in particular to a floating clamping mechanism for honing. Background Technology

[0002] Honing is a precision machining process that uses honing tools to machine the inner hole of a workpiece. It is widely used in the field of mechanical manufacturing. Horizontal honing machine tools are commonly used honing equipment, and the performance of their workpiece clamping mechanism directly affects the machining accuracy and efficiency.

[0003] In existing technologies, the clamping mechanism of horizontal honing machine tools mainly adopts the abrasive belt clamping method. Its structure typically includes a clamping base fixed to the machine tool and an abrasive belt wrapped around the outer circumference of the workpiece. The workpiece is fixed by the tension of the abrasive belt. This type of clamping mechanism relies on the regular shape of the workpiece's outer circumference to provide sufficient friction and has certain applicability in the machining of conventional workpieces, but it still has limitations in actual use.

[0004] Poor applicability: The sanding belt clamping depends on the regularity of the workpiece's outer contour. For irregularly shaped parts, the sanding belt cannot fully fit the workpiece surface, resulting in uneven clamping force distribution. During processing, the workpiece is prone to loosening or shifting, making it difficult to achieve honing of irregularly shaped parts.

[0005] Insufficient positioning accuracy: The axial positioning of the abrasive belt clamp relies on manual adjustment. When machining blind holes, it is difficult to stably guarantee the coaxiality between the workpiece end face and the honing head, which can easily lead to uneven contact between the honing tool and the inner hole of the workpiece, affecting the machining accuracy.

[0006] Inconvenient adjustment: The center position adjustment of traditional clamping mechanisms requires overall disassembly or complex mechanical structures. When changing workpieces of different specifications, readjustment is required, which is time-consuming, labor-intensive, and results in low production efficiency.

[0007] Insufficient clamping stability: For blind or deep hole workpieces, the axial positioning capability of the abrasive belt clamp is limited, and the workpiece is prone to axial movement during processing, affecting the processing quality.

[0008] Therefore, there is an urgent need for a clamping mechanism with adaptive compensation, multi-directional adjustment and rapid changeover capabilities to meet the precision requirements of honing. Utility Model Content

[0009] This utility model provides a floating clamping mechanism for honing, which can solve the problems of poor applicability, insufficient positioning accuracy, inconvenient adjustment and weak clamping stability of traditional abrasive belt clamping in the prior art.

[0010] A floating clamping mechanism for honing, used in a honing machine tool, comprising:

[0011] A connecting base plate is connected to the bottom of the reciprocating seat of the honing machine tool;

[0012] An axial adjustment device, which is fixed to the connecting base plate;

[0013] U-shaped seat, the bottom of which is connected to the top of the axial adjustment device;

[0014] A radial adjustment assembly is disposed on both sides of the U-shaped seat;

[0015] A rotary clamping device includes a lower clamping part pivotally connected to a U-shaped seat and an upper clamping part rotatably connected to one end of the lower clamping part, wherein both ends of the lower clamping part are threadedly connected to a radial adjustment assembly.

[0016] The first cylinder is fixed to the top of the upper clamp and located at the end away from the rotatable connection between the upper and lower clamps.

[0017] Furthermore, the axial adjustment device includes a bearing seat, which is fixed to the connecting base plate. The bearing seat has an axially slidingly fitted central shaft inside. The top of the central shaft is connected to the bottom of the U-shaped seat, and a first spring is provided between the central shaft and the bearing seat.

[0018] Furthermore, the axial adjustment device also includes a dual-axis adjustment assembly, which is mounted on the connecting base plate. The dual-axis adjustment assembly is provided in two sets, and the two sets of dual-axis adjustment assemblies are symmetrically arranged on both sides of the bearing seat.

[0019] Furthermore, the dual-axis adjustment assembly includes a screw shaft and a second spring. The bottom of the second spring is embedded in a stepped hole provided at the top of the screw shaft, and the top of the second spring is inserted into a stepped hole provided at the bottom of the U-shaped seat.

[0020] Furthermore, the lower clamping part includes a lower support plate, a lower clamping claw, and a gantry bracket. The lower support plate is disposed in the groove of the U-shaped seat and is threadedly connected to the radial adjustment component. The lower clamping claw is disposed in the groove of the lower support plate, and the gantry bracket is fixed to one end of the lower support plate.

[0021] Furthermore, the upper clamping part includes a pin, an upper support plate, and an upper clamping claw. One end of the pin is installed in the pin hole of the portal bracket, and the other end of the pin is connected to the upper support plate. The upper clamping claw is located in the groove of the upper support plate.

[0022] Furthermore, the upper jaw is detachably connected to the upper support plate, and the lower jaw is detachably connected to the lower support plate. Multiple sets of upper and lower jaws are provided, and the shape of the clamping hole formed by the upper and lower jaws is adapted to different workpiece outer circles.

[0023] Furthermore, the radial adjustment assembly includes a rotating shaft, a third spring, and an adjusting bolt. Second bearings are installed on both sides of the U-shaped seat, and the rotating shaft passes through the second bearings. One end of the rotating shaft is threadedly connected to the lower clamp, and a third spring is installed in the stepped hole at the other end of the rotating shaft. The third spring is connected to the adjusting bolt.

[0024] Furthermore, both the upper and lower jaws are provided with front stops, and the working surface of the front stops forms a contact limit with the end face of the workpiece.

[0025] Furthermore, it also includes a fourth spring, which is installed at the bottom of the upper clamp near the end of the first cylinder, and the bottom end of the fourth spring is inserted into a stepped hole provided on the surface of the lower clamp.

[0026] The beneficial effects of this utility model are:

[0027] This utility model provides a floating clamping mechanism for honing, including a connecting base plate, an axial adjustment device, a U-shaped seat, a radial adjustment component, a rotary clamping device, and a first cylinder. The connecting base plate is connected to the bottom of the honing machine tool's reciprocating seat to form a rigid mounting reference. The axial adjustment device is connected to the U-shaped seat to adjust the vertical height of the clamping center. The radial adjustment component is threaded to the lower clamping part to drive fine-tuning of the left and right position of the clamping center, while simultaneously achieving a pivot connection between the lower clamping part and the U-shaped seat. The upper and lower clamping parts of the rotary clamping device are rotatably connected to form a clamping structure. The first cylinder is installed at the top of the upper clamping part to provide a constant pneumatic clamping force. This mechanism compensates for the axial deviation between the workpiece and the spindle through the coordinated action of the axial adjustment device and the radial adjustment component. It adapts to the contours of irregularly shaped parts using the pivot structure of the rotary clamping device and achieves stable workpiece clamping through the lever principle driven by the first cylinder. This effectively solves the problems of poor applicability, insufficient positioning accuracy, inconvenient adjustment, and weak clamping stability of traditional belt clamping. Attached Figure Description

[0028] Figure 1 A front view of a floating clamping mechanism for honing provided by this utility model;

[0029] Figure 2 A side view of a floating clamping mechanism for honing provided by this utility model;

[0030] Figure 3 A top view of a floating clamping mechanism for honing provided by this utility model.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Connecting base plate; 2. Bearing seat; 3. Central shaft; 4. First spring; 5. First bearing; 6. Screw shaft; 7. Second spring; 8. Lower support plate; 9. Lower gripper; 10. Portal bracket; 11. Pin shaft; 12. Upper support plate; 13. Upper gripper; 14. Fourth spring; 15. Rotating shaft; 16. Third spring; 17. Second bearing; 18. Adjusting bolt; 19. Support frame; 20. U-shaped seat; 21. First cylinder; 22. Workpiece; 23. Honing machine spindle; 24. Honing tool; 25. Front stop; 26. Linear guide rail; 27. Second cylinder; 28. Inclined slider; 29. ​​Rear stop. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] like Figures 1 to 3 As shown in the figure, this utility model provides a floating clamping mechanism for honing machine tools. The floating clamping mechanism includes a connecting base plate 1, an axial adjustment device, a U-shaped seat 20, a radial adjustment assembly, a rotary clamping device, and a first cylinder 21. The connecting base plate 1 is detachably connected to the bottom of the reciprocating seat of the honing machine tool via bolts, serving as the mounting base for the entire mechanism. The axial adjustment device is fixed to the connecting base plate 1, and the bottom of the U-shaped seat 20 is connected to the top of the axial adjustment device, allowing it to float up and down. The radial adjustment assembly is located on both sides of the U-shaped seat and is used to adjust the left and right positions of the clamping center. The rotary clamping device includes a lower clamping part located within the groove of the U-shaped seat 20 and an upper clamping part rotatably connected to one end of the lower clamping part, used to clamp a workpiece 22. Both ends of the lower clamping part are threadedly connected to the radial adjustment assembly. The first cylinder 21 is fixed to the top of the upper clamping part and located at the end away from the rotatable connection between the upper and lower clamping parts. When the piston rod extends, it presses against the front end of the upper clamping part, driving the clamping action.

[0035] Specifically, such as Figure 1 As shown, the axial adjustment device includes a bearing seat 2, a central shaft 3, a first spring 4, and a dual-axis adjustment assembly. The bearing seat 2 is fixed on the connecting base plate 1, and a first bearing 5 is installed in its inner cavity. The central shaft 3 is located inside the first bearing 5, so that it forms an axial sliding fit with the bearing seat 2. At the same time, an adjusting nut is provided at the bottom of the central shaft 3. The top of the central shaft 3 is bolted to the top of the U-shaped seat 20 through a flange. A first spring 4 is provided between the central shaft 3 and the bearing seat 2 to provide axial elastic restoring force. By rotating the adjusting nut, the U-shaped seat 20 is adjusted up and down, thereby adjusting the clamping center of the mechanism.

[0036] Specifically, the dual-axis adjustment assembly is mounted on the connecting base plate 1. Two sets of the dual-axis adjustment assembly are symmetrically installed on both sides of the bearing seat 2. Each set includes a screw shaft 6 and a second spring 7. The screw shaft 6 passes through both sides of the bearing seat 2 and is fixed in position by a locking nut. The bottom of the second spring 7 is embedded in a stepped hole at the top of the screw shaft 6, and the top of the second spring 7 is inserted into a stepped hole at the bottom of the U-shaped seat 20, forming an elastic connection. Tightening the screw shaft 6 can compress or release the second spring 7, thereby adjusting the vertical movement of the U-shaped seat 20.

[0037] Specifically, such as Figure 1 As shown, the rotary clamping device includes an upper clamping part and a lower clamping part. The lower clamping part includes a lower support plate 8, a lower jaw 9, and a gantry bracket 10. The lower support plate 8 is located in the groove of the U-shaped seat 20 and is threadedly connected to the radial adjustment component. The lower jaw 9 is detachably installed in the groove of the lower support plate 8 and fixed by bolts. The gantry bracket 10 is fixed to one end of the lower support plate 8 and has a pin hole at its top.

[0038] The upper clamping part includes a pin 11, an upper support plate 12, and an upper clamping jaw 13. One end of the pin 11 is installed in the pin hole of the portal bracket 10, and the other end of the pin 11 is connected to the upper support plate 12, so that the upper support plate 12 is hinged to the portal bracket 10. The upper clamping jaw 13 is detachably installed in the groove of the upper support plate 12. Multiple sets of upper clamping jaw 13 and lower clamping jaw 9 are provided. The shape of the clamping hole formed by the upper clamping jaw 13 and lower clamping jaw 9 is adapted to the outer circle of different workpieces 22. In this embodiment, the clamping surface is circular.

[0039] Specifically, both the upper jaw 13 and the lower jaw 9 are equipped with front stops 25. The working surface of the front stops 25 contacts and limits the movement of the workpiece 22 at its end face, preventing axial movement of the workpiece 22 during processing. Figure 2 As shown, a rear stop mechanism is also provided, located on one side of the mechanism and at the bottom of the workpiece 22. The rear stop mechanism includes a linear guide rail 26, a second cylinder 27, an inclined slider 28, and a rear stop 29. The second cylinder 27 is connected to the inclined slider 28. The inclined slider 28 slides up and down along the linear guide rail 26. The second cylinder 27 drives the inclined slider 28 to make the rear stop 29 flip upward and abut against the end face of the workpiece 22. After processing, the inclined slider 28 moves downward driven by the second cylinder 27, and the rear stop 29 flips backward to remove the workpiece 22.

[0040] Specifically, a stepped hole is provided at the bottom of the upper clamping part near the first cylinder 21, and a fourth spring 14 is installed inside it. The bottom end of the fourth spring 14 is inserted into the stepped hole provided on the surface of the lower clamping part to provide the reset spring force of the upper pressure plate.

[0041] Specifically, such as Figure 1As shown, the radial adjustment assembly includes a rotating shaft 15, a second bearing 17, a third spring 16, and an adjusting bolt 18. Mounting holes are provided on both sides of the U-shaped seat 20. The second bearing 17 is interference-fitted into the mounting holes. The rotating shaft 15 passes through the second bearing 17 and can rotate freely. One end of the rotating shaft 15 is connected to the internal threads on both sides of the lower clamp via an external thread. The third spring 16 is installed in a stepped hole at the other end of the rotating shaft 15. The front end of the third spring 16 abuts against the adjusting bolt 18. The adjusting bolt 18 passes through a support frame 19, which is fixed to both sides of the U-shaped seat 20. Rotating the adjusting bolt 18 can compress or release the third spring 16. The spring force pushes the rotating shaft 15 to move slightly in the horizontal direction, thereby causing the lower support plate 8 to move left and right, achieving left and right position adjustment of the clamping center. Simultaneously, the lower support plate 8 can rotate around the center of the rotating shaft 15 to accommodate angular deviations in the axis of the inner hole of the workpiece 22.

[0042] like Figure 2 and Figure 3 As shown, the working principle of this utility model is as follows.

[0043] Installation and debugging: Fix the connecting base plate 1 to the bottom of the honing machine reciprocating seat, and adjust the nuts of the screw shaft 6 and the central shaft 3 to initially align the center of the clamping mechanism with the center of the main shaft;

[0044] Radial adjustment: Install the calibration sleeve on the honing machine spindle 23, and adjust the adjusting bolt 18 of the radial adjustment component to make the coaxiality between the calibration sleeve and the spindle ≤0.015mm;

[0045] Workpiece 22 clamping: The first cylinder 21 retracts, the upper pressure plate opens, the workpiece 22 is placed into the lower jaw 9, the first cylinder 21 is activated, the rod extends to press the upper pressure plate, the upper and lower jaws 9 clamp the workpiece 22, the front stop 25 restricts the axial movement of the workpiece 22, the second cylinder 27 is activated, the rod extends to push the inclined slider 28 to slide upward, the rear stop 29 flips upward to abut against the end face of the workpiece 22;

[0046] Machining operation: Move the reciprocating seat to allow the honing tool 24 to enter the inner hole of the workpiece 22, and perform honing after adjusting the stroke;

[0047] Workpiece 22 replacement: The first cylinder 21 and the second cylinder 27 retract, the upper clamp opens under the action of the fourth spring 14, the inclined slider 28 moves down, the rear stop 29 flips backward, and the workpiece 22 or the gripper is replaced. The above process is repeated.

[0048] The honing floating clamping mechanism provided by this utility model achieves three-dimensional floating of the clamping center through the cooperation of the dual-axis adjustment component (up and down) and the radial adjustment component (left and right). It automatically compensates for the axial deviation between the workpiece 22 and the spindle, with a coaxiality error of ≤0.01mm. The detachable jaws, in conjunction with the axial front stop 25, can clamp irregularly shaped parts, through holes, or blind holes 22, solving the limitations of traditional belt clamping. At the same time, by changing the upper and lower jaws 9 with different structures, it is easy to switch between processing different products, saving time and effort.

[0049] The embodiments of this utility model have been described in detail above, but the content is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made in accordance with the claims of this utility model should still fall within the patent coverage of this utility model.

Claims

1. A floating clamping mechanism for honing, used in a honing machine tool, characterized in that, include: A connecting base plate (1) is connected to the bottom of the reciprocating seat of the honing machine tool; An axial adjustment device is fixed on a connecting base plate (1); U-shaped seat (20), the bottom of which is connected to the top of the axial adjustment device; A radial adjustment assembly is disposed on both sides of the U-shaped seat (20); A rotary clamping device includes a lower clamping part pivotally connected to a U-shaped seat (20) and an upper clamping part rotatably connected to one end of the lower clamping part, wherein both ends of the lower clamping part are threadedly connected to a radial adjustment assembly. The first cylinder (21) is fixed to the top of the upper clamp and located at the end away from the rotatable connection between the upper clamp and the lower clamp.

2. The floating clamping mechanism for honing holes as described in claim 1, characterized in that, The axial adjustment device includes a bearing seat (2), which is fixed on the connecting base plate (1). The bearing seat (2) has an axially sliding fit central shaft (3) inside. The top of the central shaft (3) is connected to the bottom of the U-shaped seat (20). A first spring (4) is provided between the central shaft (3) and the bearing seat (2).

3. The floating clamping mechanism for honing holes as described in claim 2, characterized in that, The axial adjustment device also includes a dual-axis adjustment assembly, which is installed on the connecting base plate (1). The dual-axis adjustment assembly is provided in two sets, and the two sets of dual-axis adjustment assemblies are symmetrically arranged on both sides of the bearing seat (2).

4. A floating clamping mechanism for honing holes as described in claim 3, characterized in that, The dual-axis adjustment assembly includes a screw shaft (6) and a second spring (7). The bottom of the second spring (7) is embedded in a stepped hole provided at the top of the screw shaft (6), and the top of the second spring (7) is inserted into a stepped hole provided at the bottom of the U-shaped seat (20).

5. A floating clamping mechanism for honing holes as described in claim 1, characterized in that, The lower clamping part includes a lower support plate (8), a lower clamping claw (9) and a gate-shaped bracket (10). The lower support plate (8) is located in the groove of the U-shaped seat (20) and is threadedly connected to the radial adjustment component. The lower clamping claw (9) is located in the groove of the lower support plate (8). The gate-shaped bracket (10) is fixed to one end of the lower support plate (8).

6. A floating clamping mechanism for honing holes as described in claim 5, characterized in that, The upper clamping part includes a pin (11), an upper support plate (12) and an upper clamping claw (13). One end of the pin (11) is installed in the pin hole of the gantry bracket (10), and the other end of the pin (11) is connected to the upper support plate (12). The upper clamping claw (13) is located in the groove of the upper support plate (12).

7. A floating clamping mechanism for honing holes as described in claim 6, characterized in that, The upper jaw (13) is detachably connected to the upper support plate (12), and the lower jaw (9) is detachably connected to the lower support plate (8). The upper jaw (13) and the lower jaw (9) are provided in multiple sets. The shape of the clamping hole formed by the upper jaw (13) and the lower jaw (9) is adapted to the outer circle of different workpieces (22).

8. A floating clamping mechanism for honing holes as described in claim 1 or 6, characterized in that, The radial adjustment assembly includes a rotating shaft (15), a third spring (16), and an adjusting bolt (18). Second bearings (17) are installed on both sides of the U-shaped seat (20). The rotating shaft (15) passes through the second bearings (17). One end of the rotating shaft (15) is threaded to the lower clamp. The third spring (16) is installed in the stepped hole at the other end of the rotating shaft (15). The third spring (16) is connected to the adjusting bolt (18).

9. A floating clamping mechanism for honing holes as described in claim 6, characterized in that, Both the upper jaw (13) and the lower jaw (9) are provided with front stops (25), and the working surface of the front stops (25) forms a contact limit with the end face of the workpiece (22).

10. A floating clamping mechanism for honing holes as described in claim 1, characterized in that, It also includes a fourth spring (14), which is installed at the bottom of the upper clamp near the first cylinder (21), and the bottom end of the fourth spring (14) is inserted into a stepped hole provided on the surface of the lower clamp.

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