Deflection mechanism for grinding center hole

Abstract

The utility model discloses a center hole grinding deflection mechanism which comprises a supporting seat, a grinding head fixing plate is embedded in the supporting seat in the horizontal direction, a deflection assembly is installed on the grinding head fixing plate, an installation seat connected with the grinding head fixing plate is arranged on one side of the deflection assembly, and a main shaft is installed on the installation seat in a matched mode. The deflection assembly comprises a stepping motor, the output end of the stepping motor is connected with a deflection shaft, and the free end of the deflection shaft is in transmission connection with the grinding head fixing plate; displacement sensors are symmetrically installed on the two sides of the grinding head fixing plate, and limiting assemblies are arranged on the periphery of the grinding head fixing plate. Deflection of the grinding wheel rod can be adjusted through a machine tool numerical control system so as to eliminate micro deformation of the grinding wheel rod in the grinding process, the shape of a small hole can be effectively guaranteed, and the cylindricity requirement of a product can be better met.

Description

Technical Field

[0001] The utility model relates to a deflection mechanism, in particular to a grinding hole deflection mechanism. Background Art

[0002] Most of the fuel injection components of automobile engines are precision parts, especially the oil inlet holes, which involve high pressure and flow requirements. They are all small hole designs and need to be precisely ground. In the process of high-precision small hole grinding, due to structural limitations, the rigidity of the grinding wheel rod is relatively low, so a slight deformation will occur during the grinding process, resulting in changes in the shape of the processed hole, forming a waist drum shape, a saddle shape, or a trumpet shape, which increases the cylindricality error of the hole. During this process, it is difficult to make adjustments to ensure the stability of the processing, which seriously affects the improvement of product quality. Utility Model Content

[0003] In order to solve the deficiencies of the above-mentioned technology, the utility model provides a grinding hole deflection mechanism, which eliminates the shape change of the hole caused by the slight deformation of the grinding wheel rod during the grinding process through the deflection type hole taper adjustment mechanism, so that the shape of the hole is as close to the ideal state as possible.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a grinding hole deflection mechanism, including a support seat, a grinding head fixing plate is embedded in the support seat along the horizontal direction, a deflection assembly is installed on the grinding head fixing plate, a mounting seat connected to the grinding head fixing plate is provided on one side of the deflection assembly, and a main shaft is matched and installed on the mounting seat;

[0005] The deflection assembly includes a stepper motor, the output end of the stepper motor is connected to a deflection shaft, and the free end of the deflection shaft is connected to the grinding head fixing plate for transmission;

[0006] Displacement sensors are symmetrically installed on both sides of the grinding head fixing plate, and a limit position component is arranged around the displacement sensors.

[0007] Preferably, the support seat includes an upper pressing plate, a lower pressing plate, and a grinding head base plate located between the upper pressing plate and the lower pressing plate, and the upper pressing plate, the lower pressing plate, and the grinding head base plate are fastened to each other by screws.

[0008] Preferably, the grinding head fixing plate is embedded in the grinding head bottom plate with a gap provided therebetween.

[0009] Preferably, a positioning sleeve is matchedly sleeved outside the yaw shaft, a bearing is correspondingly provided on the outer wall of the positioning sleeve, a yaw housing is sleeved outside the bearing, and the stepper motor is installed in the yaw housing.

[0010] Preferably, the end of the deflection shaft is connected to the cam via a flat key.

[0011] Preferably, a groove matching with the cam is formed on the grinding head fixing plate, and the cam is installed in the groove.

[0012] Preferably, the limiting assembly includes a taper adjustment spring located at the front end of the grinding head fixing plate and a spring located at the side of the grinding head fixing plate, and the taper adjustment spring is installed between the grinding head fixing plate and the grinding head bottom plate in the horizontal direction.

[0013] Preferably, a washer is sleeved on the taper adjustment spring piece and is firmly connected to the grinding head bottom plate.

[0014] Preferably, an arc-shaped groove is provided on the side of the grinding head fixing plate, the free end of the spring is placed in the arc-shaped groove, and the other end is fixedly connected to the grinding head bottom plate.

[0015] The utility model can adjust the deflection of the grinding wheel rod through the numerical control system of the machine tool to eliminate the slight deformation of the grinding wheel rod during the grinding process, can effectively ensure the shape of the small hole, and better meet the cylindricality requirements of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0017] Figure 2 yes Figure 1 AA section view.

[0018] Figure 3 is a cross-sectional view of the yaw assembly.

[0019] In the figure: 1. Support seat; 2. Deflection assembly; 3. Mounting seat; 4. Spindle; 5. Grinding head fixing plate; 6. Displacement sensor; 7. Taper adjustment spring; 8. Spring; 11. Upper pressure plate; 12. Lower pressure plate; 13. Grinding head base plate; 21. Stepper motor; 22. Deflection shaft; 23. Positioning sleeve; 24. Bearing; 25. Deflection housing; 26. Cam; 27. Flat key; 51. Groove. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0022] like Figure 1The hole-in-mill deflection mechanism shown in the figure comprises a support seat 1, a grinding head fixing plate 5 is embedded in the support seat 1 along the horizontal direction, a deflection assembly 2 is installed on the grinding head fixing plate 5, a mounting seat 3 connected to the grinding head fixing plate is provided on one side of the deflection assembly 2, and a main shaft 4 is matched and installed on the mounting seat 3;

[0023] In actual use, one end of the spindle is connected to a motor and the other end is connected to a grinding wheel. This design uses a deflection assembly to slightly deflect the spindle, thereby eliminating the slight deformation of the grinding wheel rod during the grinding process.

[0024] Preferably, the support seat 1 comprises an upper pressing plate 11, a lower pressing plate 12, and a grinding head bottom plate 13 located between the upper pressing plate and the lower pressing plate, and the upper pressing plate 11, the lower pressing plate 12, and the grinding head bottom plate 13 are fastened together by screws. The support seat cooperates with the deflection assembly as a supporting carrier, drives the mounting seat therein to swing slightly, and further drives the spindle connected to the mounting seat to swing slightly, so as to meet the processing requirements of the workpiece.

[0025] In order to facilitate the micro-swing of the grinding head fixing plate, the grinding head fixing plate 5 is embedded in the grinding head bottom plate 13 and a gap is provided between the grinding head fixing plate 5 and the grinding head bottom plate. A gap is left between the grinding head fixing plate and the grinding head bottom plate to facilitate micro-adjustment of the spindle during workpiece processing.

[0026] As a preference, Figure 3 As shown, the deflection assembly 2 includes a stepper motor 21, the output end of the stepper motor 21 is connected to a deflection shaft 22, and the free end of the deflection shaft 22 is connected to the grinding head fixing plate 5 in a transmission manner; a positioning sleeve 23 is matched and sleeved on the outer side of the deflection shaft 22, and a bearing 24 is correspondingly arranged on the outer wall of the positioning sleeve 23, and a deflection housing 25 is sleeved on the outer side of the bearing 24, and the stepper motor 21 is installed in the deflection housing 25. The end of the deflection shaft 22 is connected to the cam 26 through a flat key 27. A positioning sleeve is installed between the deflection shaft and the deflection housing, and a bearing is installed on the positioning sleeve.

[0027] Furthermore, a groove 51 matching with the cam is provided on the grinding head fixing plate 5, and the cam 26 is installed in the groove 51. The cam is arranged in the groove on the surface of the grinding head fixing plate.

[0028] like Figure 2 As shown, displacement sensors 6 are symmetrically installed on both sides of the grinding head fixing plate 5, and a limit position component is arranged around it.

[0029] The limiting assembly includes a taper adjustment spring piece 7 located at the front end of the grinding head fixing plate 5 and a spring 8 located at the side of the grinding head fixing plate 5. The taper adjustment spring piece 7 is installed between the grinding head fixing plate 5 and the grinding head bottom plate 13 in the horizontal direction. A cushion sleeve is placed on the taper adjustment spring piece 7 and is tightly connected to the grinding head bottom plate 13. An arc groove is opened on the side of the grinding head fixing plate 5, and the free end of the spring 8 is placed in the arc groove, and the other end is fixedly connected to the grinding head bottom plate.

[0030] When the utility model is working, a pulse signal is sent to the stepper motor on the deflection assembly according to the measurement error of the workpiece. The rotation of the stepper motor drives the deflection shaft and the bearing to rotate, and further drives the eccentric cam to rotate, thereby driving the grinding head fixing plate to perform a slight deflection. The front end of the grinding head fixing plate is adjusted by a taper spring, and the side end is elastically swung by a spring, and the deflection data can be obtained through a displacement sensor, thereby driving the main shaft to make a slight deflection of the grinding wheel rod to compensate for the deformation of the grinding wheel rod, so that the center hole grinding wheel can always maintain full contact with the processed surface, thereby ensuring that the cylindricity (taper) of the processed hole meets the design requirements.

[0031] The utility model aims to provide a hole deflection mechanism in grinding, which is used to eliminate the shape change of the hole caused by the slight deformation of the grinding wheel rod during the grinding process, so that the shape of the hole is as close to the ideal state as possible, thereby better meeting the cylindricity requirements of the product.

[0032] The above implementation modes are not limitations of the present invention, and the present invention is not limited to the above examples. Any changes, modifications, additions or substitutions made by technicians in this technical field within the technical solution of the present invention also fall within the protection scope of the present invention.

Claims

1. A grinding hole deflection mechanism, characterized in that: The invention comprises a support seat (1), a grinding head fixing plate (5) is embedded in the support seat (1) in the horizontal direction, a deflection assembly (2) is installed on the grinding head fixing plate (5), a mounting seat (3) connected to the grinding head fixing plate is provided on one side of the deflection assembly (2), and a main shaft (4) is matched and installed on the mounting seat (3); The deflection assembly (2) comprises a stepping motor (21), the output end of the stepping motor (21) is connected to a deflection shaft (22), and the free end of the deflection shaft (22) is drivingly connected to a grinding head fixing plate (5); Displacement sensors (6) are symmetrically mounted on both sides of the grinding head fixing plate (5), and a limiting component is arranged around the periphery thereof.

2. The grinding hole deflection mechanism according to claim 1, characterized in that: The support seat (1) comprises an upper pressing plate (11), a lower pressing plate (12), and a grinding head base plate (13) located between the upper pressing plate and the lower pressing plate; the upper pressing plate (11), the lower pressing plate (12), and the grinding head base plate (13) are fastened to each other by screws.

3. The grinding hole deflection mechanism according to claim 1, characterized in that: The grinding head fixing plate (5) is embedded in the grinding head bottom plate (13) and a gap is provided between the grinding head fixing plate (5).

4. The grinding hole deflection mechanism according to claim 1, characterized in that: A positioning sleeve (23) is matched and sleeved on the outside of the deflection shaft (22), a bearing (24) is correspondingly provided on the outer wall of the positioning sleeve (23), a deflection housing (25) is sleeved on the outer side of the bearing (24), and the stepping motor (21) is installed in the deflection housing (25).

5. The grinding hole deflection mechanism according to claim 4, characterized in that: The end of the deflection shaft (22) is connected to the cam (26) via a flat key (27).

6. The grinding hole deflection mechanism according to claim 5, characterized in that: The grinding head fixing plate (5) is provided with a groove (51) matched with the cam, and the cam (26) is installed in the groove (51).

7. The grinding hole deflection mechanism according to claim 1, characterized in that: The limiting assembly comprises a taper adjustment spring piece (7) located at the front end of the grinding head fixing plate (5) and a spring (8) located at the side of the grinding head fixing plate (5); the taper adjustment spring piece (7) is installed between the grinding head fixing plate (5) and the grinding head bottom plate (13) in the horizontal direction.

8. The grinding hole deflection mechanism according to claim 7, characterized in that: The taper adjustment spring piece (7) is sleeved with a washer and is tightly connected to the grinding head bottom plate (13).

9. The grinding hole deflection mechanism according to claim 7, characterized in that: An arc groove is provided on the side of the grinding head fixing plate (5), the free end of the spring (8) is placed in the arc groove, and the other end is fixedly connected to the grinding head bottom plate.

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