Reversing valve body multi-section stepped hole polishing device based on elliptic cambered surface expansion

Abstract

The utility model discloses a reversing valve body multi-section stepped hole polishing device based on elliptic cambered surface expansion. The reversing valve body multi-section stepped hole polishing device comprises an elliptic expansion polishing piece and two guide devices. The two guiding devices are connected to the two ends of the oval expanding and polishing piece through the expanding grooves. The oval expansion polishing part comprises an inner oval shaft and two outer polishing shafts, the two outer polishing shafts are symmetrically arranged on the outer side of the inner oval shaft, the outer polishing shafts are connected with the expansion groove through extending parts at the two ends, and polishing parts are arranged on the polishing contact surfaces of the outer polishing shafts; when the two outer polishing shafts are folded, the polishing rotation diameter of the oval expansion polishing piece is the small hole diameter of the stepped hole, and when the two outer polishing shafts are expanded through the long shaft of the inner oval shaft, the polishing rotation diameter of the oval expansion polishing piece is the large hole diameter of the stepped hole. The polishing device can enter from an inner hole with a small hole diameter and polish a large-hole-diameter stepped hole through expansion.

Description

Technical Field

[0001] The utility model belongs to the technical field of polishing, and relates to a polishing device for multi-stage stepped holes of a reversing valve body based on elliptical arc surface expansion. Background Art

[0002] The acrylic hydraulic reversing valve body, after machining, must keep the internal structure of the valve body transparent. When using such an acrylic hydraulic reversing valve, the flow of hydraulic oil and the movement of the valve core can be roughly seen. There is an inner hole in the acrylic hydraulic valve body, and a number of stepped holes are arranged on the inner hole. For the inner hole with a small aperture, a reamer can be used to ream the hole to ensure the transparency of the inner surface. However, the stepped hole coaxial with the inner hole has a larger aperture and needs to be polished. Because it is a stepped hole, there is a spacing between adjacent holes, and the hole cavity is not large. Extending into the inner hole with a smaller aperture will limit the movement of the polishing rod. Therefore, a special polishing device is needed to realize the polishing of coaxial holes of different diameters. Utility Model Content

[0003] Purpose of the utility model: The purpose of the utility model is to solve the problem that the polishing cannot be completed due to the different apertures of the stepped holes on the inner hole of the hydraulic reversing valve body, and to provide a multi-stage stepped hole polishing device for the reversing valve body based on the expansion of the elliptical arc surface.

[0004] Technical solution: The utility model discloses a multi-stage stepped hole polishing device for a reversing valve body based on elliptical arc surface expansion, comprising an elliptical expansion polishing member and two guide devices; the guide device is provided with an expansion groove, and the two guide devices are connected to the two ends of the elliptical expansion polishing member; the elliptical expansion polishing member comprises an inner elliptical axis and two outer polishing axes, the two outer polishing axes are symmetrically arranged on the outside of the inner elliptical axis, the outer polishing axes are connected to the expansion groove through extensions at both ends, and the polishing contact surfaces of the outer polishing axes are provided with polishing portions; when the two outer polishing axes are closed, the polishing rotation diameter of the elliptical expansion polishing member is the small hole diameter of the stepped hole, and when the long axis of the inner elliptical axis expands the two outer polishing axes, the polishing rotation diameter of the elliptical expansion polishing member is the large hole diameter of the stepped hole.

[0005] Furthermore, connecting ends are provided in the extension direction of both ends of the inner elliptical axis, threads are provided on the connecting ends, connecting holes are provided on the guide device, and the connecting ends pass through the connecting holes and lock the elliptical expansion polishing piece and the guide device through a spiral locking device.

[0006] Furthermore, a mounting hole is provided at the end of the connecting end, and a hand lever for adjusting the expansion shaft is provided on the mounting hole.

[0007] Furthermore, a spring return device is provided between the outer polishing shaft and the expansion groove.

[0008] Furthermore, the polishing portion is an elliptical arc surface, and a strip groove for embedding the polishing cloth strip is provided on the outer side of the elliptical arc surface.

[0009] Furthermore, the diameter of the connecting end is smaller than the length of the major axis of the inner ellipse axis.

[0010] Furthermore, a rotating wheel connected to the belt is arranged on the outer side of the guide device.

[0011] Beneficial effects: Compared with the prior art, the utility model has the following advantages: 1. The expansion of the polishing device is achieved through the radius difference between the major and minor axes of the elliptical arc surface of the inner elliptical axis in the elliptical expansion polishing piece, so that the polishing device can enter from the inner hole with a small aperture and realize the polishing of the large aperture step hole through expansion;

[0012] 2. The spiral locking device outside the device ensures the locking state during the polishing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the utility model when in use.

[0014] Figure 2 It is a structural schematic diagram of the combination of the elliptical expansion polishing member and the guide device of the utility model.

[0015] Figure 3 It is a structural schematic diagram of the guide device of the utility model.

[0016] Figure 4 It is a structural schematic diagram of the external polishing shaft of the utility model.

[0017] Figure 5 It is a structural schematic diagram of the inner elliptical axis of the utility model. DETAILED DESCRIPTION

[0018] The technical solution of the utility model is further described below in conjunction with the accompanying drawings.

[0019] like Figure 1-5 As shown, a multi-stage stepped hole polishing device for a directional control valve body based on elliptical arc expansion in this embodiment is used to polish the stepped hole in an acrylic hydraulic directional control valve body 1. The diameter of the inner hole 11 in the acrylic hydraulic directional control valve body 1 is There are 4 apertures arranged at intervals. The step hole 12 of the present embodiment comprises an elliptical expansion polishing member 2 and two guide devices 3, the two guide devices 3 are connected to the two ends of the elliptical expansion polishing member 2, and the guide device 3 is provided with an expansion groove 4, the elliptical expansion polishing member 2 comprises an inner elliptical axis 5 and two outer polishing axes 6, the two outer polishing axes 6 are symmetrically arranged on the outer side of the inner elliptical axis 5, and the extension 61 of the outer polishing axis 6 is in the expansion groove 4. The polishing contact surface of the outer polishing axis 6 is provided with a polishing portion 62, in a specific embodiment, the polishing portion 62 is an elliptical arc surface, and a strip groove 63 for embedding a polishing cloth strip is provided on the outer side of the polishing portion 62 of the elliptical arc surface, which is used to support the cloth strip, and the proper application of polishing paste during the polishing process can make the polishing effect better.

[0020] The inner elliptical shaft 5 is provided with connecting ends 51 in the extending direction at both ends. The diameter of the connecting ends 51 is smaller than the length of the long axis of the inner elliptical shaft 5. The connecting ends 51 extend from the connecting holes 31 of the guide device 3. The extending part of the connecting ends 51 is provided with threads 53. The threads 53 cooperate with the thread locking device 7 to lock the elliptical expansion polishing member 2 and the guide device 3. After the expansion and contraction of the entire expansion shaft and the polishing device are adjusted, the locking state during the polishing process is guaranteed by tightening the thread locking device 7. Further, in order to facilitate the rotation of the inner elliptical shaft 5, a mounting hole 52 is provided at the end of the connecting end 51, and a hand rod 8 for adjusting the expansion shaft is provided on the mounting hole 52.

[0021] Furthermore, a rotating wheel 9 connected to a belt is provided on the outer side of the guide device 3. When the polishing state is adjusted, the rotating wheel 9 drives the elliptical expansion polishing member 2 to rotate for polishing.

[0022] Furthermore, a spring reset device (not shown in the figure) is provided between the outer polishing shaft 6 and the expansion groove 4, so that after polishing, the outer polishing shaft 6 can be quickly reset and the diameter can be reduced, so that the elliptical expansion polishing piece 2 can be passed through the inner hole 11 with a small aperture and removed.

[0023] The specific operation process is as follows: First, the elliptical expansion polishing member 2 is in the reset state, at this time, the two outer polishing shafts 6 are closed, and the polishing rotation diameter of the elliptical expansion polishing member 2 is the diameter of the inner hole 11. It is inserted from the inner hole of the acrylic hydraulic reversing valve body 1. When the elliptical arc surface 62 on the outer polishing shaft 6 is at the large step hole 12, in order to The stepped hole 12 is polished, and the inner elliptical axis 5 is rotated 90° by the hand rod 8 through the expansion axis to adjust the length of the elliptical arc axis. The outer polishing axis 6 will expand downward along the notch direction of the expansion groove 4, so as to achieve the polishing rotation diameter of the polishing tool from arrive Then, the elliptical expansion polishing member 2 and the guide device 3 are locked by the spiral locking device 7, and the rotating wheel 9 is driven by the external motor to rotate the elliptical expansion polishing member 2 to achieve the purpose of Step hole Finally, when polishing is finished, the inner elliptical axis 5 is rotated back 90° by the hand rod 8 through the expansion axis to adjust the long and short arcs of the elliptical arc axis, so that the elliptical expansion polishing part 2 returns to the reset state and is taken out from the acrylic hydraulic reversing valve body 1, and polishing is finished.

Claims

1. A multi-stage stepped hole polishing device for a reversing valve body based on elliptical arc surface expansion, characterized in that: It includes an elliptical expansion polishing piece and two guiding devices; the guiding device is provided with an expansion groove, and the two guiding devices are connected to the two ends of the elliptical expansion polishing piece; the elliptical expansion polishing piece includes an inner elliptical axis and two outer polishing axes, the two outer polishing axes are symmetrically arranged on the outside of the inner elliptical axis, the outer polishing axes are connected to the expansion groove through extensions at both ends, and the polishing contact surfaces of the outer polishing axes are provided with polishing parts; when the two outer polishing axes are closed, the polishing rotation diameter of the elliptical expansion polishing piece is the small hole diameter of the stepped hole, and when the long axis of the inner elliptical axis expands the two outer polishing axes, the polishing rotation diameter of the elliptical expansion polishing piece is the large hole diameter of the stepped hole.

2. The polishing device for multi-stage stepped holes of a directional valve body based on elliptical arc surface expansion according to claim 1 is characterized in that: Connecting ends are provided in the extension direction of both ends of the inner elliptical axis, threads are provided on the connecting ends, connecting holes are provided on the guide device, and the connecting ends pass through the connecting holes and lock the elliptical expansion polishing piece and the guide device through a spiral locking device.

3. The polishing device for multi-stage stepped holes of a reversing valve body based on elliptical arc surface expansion according to claim 2 is characterized in that: The end of the connecting end is provided with a mounting hole, and a hand lever for adjusting the expansion shaft is provided on the mounting hole.

4. The device for polishing multi-stage stepped holes of a directional valve body based on elliptical arc surface expansion according to claim 1 is characterized in that: A spring return device is arranged between the outer polishing shaft and the expansion groove.

5. The polishing device for multi-stage stepped holes of a directional valve body based on elliptical arc surface expansion according to claim 1 is characterized in that: The polishing portion is an elliptical arc surface, and a strip groove for embedding a polishing cloth strip is provided on the outer side of the elliptical arc surface.

6. The polishing device for multi-stage stepped holes of a reversing valve body based on elliptical arc surface expansion according to claim 2 is characterized in that: The diameter of the connecting end is smaller than the length of the major axis of the inner ellipse axis.

7. The polishing device for multi-stage stepped holes of a reversing valve body based on elliptical arc surface expansion according to claim 1 is characterized in that: A rotating wheel connected with the belt is arranged on the outer side of the guide device.

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