Reversing valve body multi-section stepped hole turning device

Abstract

The utility model discloses a reversing valve body multi-section stepped hole turning device which comprises a forming cutter, a cutter accompanying body, a main sheath and a driven sheath, the forming cutter is arranged in the main sheath, the main sheath comprises an arc-shaped first sheath body and an arc-shaped second sheath body, the second sheath body is arranged on the inner side of the first sheath body, and the driven sheath body is arranged on the inner side of the second sheath body. The axis of the first sheath body is coaxial with a stepped hole needing to be formed in the reversing valve body, and the axis of the forming cutter moves under the action of the second sheath body, so that the cutting edge part of the forming cutter can expand relative to the axis of the stepped hole during rotation; the driven sheath sleeves the outside of the main sheath, a guide groove is formed in the driven sheath, the guide groove comprises an embedding part and a limiting part, the forming cutter is embedded in the embedding part so that the driven sheath can drive the forming cutter to rotate synchronously when rotating, and the limiting part abuts against the first sheath body to achieve the effect of limiting the rotating angle of the driven sheath. The forming cutter can stretch out and draw back, and the position of the cutting edge can be adjusted when the cutter rotates to complete forming machining of the stepped hole.

Description

Technical Field

[0001] The utility model belongs to the technical field of turning tools and relates to a turning and processing device for multi-stage stepped holes of a reversing valve body. Background Art

[0002] The hydraulic reversing valve is a valve that uses the absolute movement of the valve core and the valve body to make the oil circuit flow, shut off or change the direction of oil flow, so that the hydraulic actuator and its drive mechanism can be driven, stopped or change the direction of movement. The hydraulic valve is provided with a passage inside, and the inner hole has a size tolerance of 1-2 wires, and the hole group has a coaxial requirement. It is mainly used for the valve body and the valve core of the reversing valve to slide flexibly, but the gap cannot be too large. The outer stepped hole is the oil chamber. There are multiple stepped holes and they are spaced alternately. The aperture of the stepped hole is larger than the inner hole, and special processing is required during molding. At present, when machining multi-stage stepped holes in hydraulic reversing valves, there is a problem that the tool cannot enter from the small inner hole to perform molding processing on the stepped hole. Therefore, a special vehicle is needed to process the acrylic hydraulic reversing valve body to achieve specific processing requirements. Utility Model Content

[0003] Purpose of the utility model: The purpose of the utility model is to solve the problem that when machining multi-stage stepped holes in a hydraulic reversing valve, the tool cannot enter from a small inner hole to perform forming machining on the stepped holes, and to provide a multi-stage stepped hole machining device for a reversing valve body.

[0004] Technical solution: The utility model discloses a multi-stage stepped hole turning device for a reversing valve body, comprising a forming tool and a tool companion body, a main scabbard and a driven scabbard, wherein the forming tool is arranged in the main scabbard, and the main scabbard comprises an arc-shaped first scabbard body and a second scabbard body, wherein the second scabbard body is arranged on the inner side of the first scabbard body, and the axis of the first scabbard body is coaxial with the stepped hole to be formed in the reversing valve body, and the forming tool is axially displaced under the action of the second scabbard body so that the cutting edge thereof can expand relative to the axis of the stepped hole when rotating; the driven scabbard is sleeved on the outside of the main scabbard, and a guide groove is arranged on the driven scabbard, wherein the guide groove comprises an engaging portion and a limiting portion, and the forming tool is engaged in the engaging portion so that the forming tool is driven to rotate synchronously when the driven scabbard rotates, and the limiting portion achieves the function of limiting the rotation angle of the driven scabbard by abutting against the first scabbard body.

[0005] Furthermore, the limiting portion includes a first limiting point and a second limiting point, wherein the first limiting point limits the angle of rotation of the forming tool by abutting against the upper end of the first sheath body, and the second limiting point limits the angle of retraction of the forming tool by abutting against the lower end of the first sheath body.

[0006] Furthermore, a moving device for driving the forming tool to move forward and backward is provided in the tool body, and the moving device includes a rack shaft and a cylindrical gear. The rack shaft is connected to the end of the forming tool away from the cutting edge, and the cylindrical gear is engaged with the rack on the rack shaft. The rotation of the cylindrical gear drives the rack shaft to move forward and backward, thereby moving the forming tool forward and backward.

[0007] Furthermore, a driving device for driving the movable scabbard to rotate is arranged outside the driven scabbard, and the driving device drives the driven scabbard to rotate, thereby driving the forming tool to rotate to perform the forming process of the stepped hole.

[0008] Furthermore, the forming tool has a plurality of cutting edges which are arranged at intervals.

[0009] Furthermore, the lathe processing device also includes a tapered shank, and the tapered shank is arranged at the rear end of the tool body.

[0010] Furthermore, the main scabbard is fixed to the knife companion body through an end surface pressure plate.

[0011] Beneficial effects: Compared with the prior art, the utility model has the following advantages: the forming tool of the utility model can be retracted, and the position of the cutting edge can be adjusted when the tool rotates to complete the forming process of the stepped hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0013] Figure 2 Schematic diagram of the main scabbard structure.

[0014] Figure 3 It is a schematic diagram of the structure of the driven scabbard.

[0015] Figure 4 Cross-sectional view of the forming tool when it is turned out

[0016] Figure 5 This is a cross-sectional view of the forming tool when it is retracted.

[0017] Figure 6 It is a schematic diagram of the operation of the utility model during operation. DETAILED DESCRIPTION

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

[0019] like Figure 1-6As shown, the multi-stage stepped hole turning device of the valve body of the reversing valve of this embodiment comprises a tool companion body 1, a forming tool 2, a main scabbard 3 and a driven scabbard 4, which are arranged from the inside to the outside in the order of the forming tool 2, the main scabbard 3 and the driven scabbard 4. The forming tool 2 can move forward and backward in the main scabbard 3, and the driven scabbard 4 is sleeved on the outside of the main scabbard 3. The driven scabbard 4 is provided with a guide groove, and the forming tool 2 and the main scabbard 3 pass through the guide groove and are connected to the tool companion body 1 through the end face pressure plate 7 on the main scabbard 3. In a specific embodiment, a tapered handle 6 is provided at the rear end of the tool companion body 1, and the cutting edges of the forming tool 2 are multiple and arranged at intervals, which are consistent with the intervals of the stepped holes 10 to be machined and formed.

[0020] The main scabbard 3 includes an arc-shaped first scabbard body 31 and a second scabbard body 32. The second scabbard body 32 is arranged on the inner side of the first scabbard body 31. The axis of the first scabbard body 32 is coaxial with the stepped hole 10 to be formed in the valve body of the reversing valve. The forming tool 2 is axially displaced under the action of the second scabbard body 32 so that when it rotates, its cutting edge can expand relative to the axis position of the stepped hole 10 to be formed in the valve body of the reversing valve, so that the turning range can be expanded when it rotates.

[0021] like Figure 3-5 As shown, the guide groove includes an engaging portion 41 and a limiting portion 42. The shape of the engaging portion 41 is consistent with the cross-sectional shape of the forming tool 2, as shown in the shaded part in the figure. The forming tool 2 is engaged in the engaging portion 41 so that the forming tool 2 is driven to rotate synchronously when the driven scabbard 4 rotates. The limiting portion 42 abuts against the first scabbard body 31 to limit the rotation angle of the driven scabbard 4.

[0022] The limiting portion 42 includes a first limiting point A and a second limiting point B. When the forming tool 2 moves to the specified position, the driven scabbard 4 is driven to rotate by a driving device (not shown in the figure), thereby driving the forming tool 2 to rotate to perform the forming process of the stepped hole 10. At this time, the forming tool 2 is driven by the driven scabbard 4 to turn the inner wall of the hydraulic reversing valve, and at the same time, the main scabbard 3 moves in the guide groove of the driven scabbard 4. The forming tool 2 rotates relative to the main scabbard 3. Since its axis is displaced under the action of the second scabbard body 32, the cutting edge part will expand relative to the axis of the stepped hole 10 during rotation, so that it can expand the turning range during rotation and gradually expand the aperture until the upper end of the first scabbard body 31 abuts against the first limiting point A of the guide groove, and the forming tool 2 can no longer be rotated out, and the processing is completed. When retracting the forming tool 2, it is only necessary to drive the driven scabbard 4 to rotate in the opposite direction. The forming tool 2 is retracted under the drive of the driven scabbard 4 until the outer wall of the lower end of the first scabbard body 31 abuts against the second limit point B, limiting the retraction angle of the forming tool 2. After retraction, the forming tool 2 can pass through the area with a smaller aperture in the inner hole.

[0023] In a specific embodiment, the movement of the forming tool 2 is achieved by setting a moving device in the tool body 1, and the moving device includes a rack shaft 51 and a cylindrical gear 52. The rack shaft 51 is connected to the end of the forming tool 2 away from the cutting edge, and the cylindrical gear 52 is engaged with the rack on the rack shaft 51. The rotation of the cylindrical gear 52 drives the rack shaft 51 to move forward and backward, thereby moving the forming tool 2 forward and backward.

[0024] like Figure 6 As shown, since the valve body is in the shape of a rectangular parallelepiped, in order to be able to process the valve body hole according to the requirements of the drawing and to be able to perform hole processing of multiple stepped holes 10, therefore, in actual operation, a special chuck 8 is designed for use in conjunction with the practical turning processing device of this invention. During operation, the hydraulic valve body 9 is clamped using the special chuck 8, and the forming tool 2 is controlled by the moving device to be extended to the position where the stepped hole 10 needs to be processed, and the rotation of the driven sheath 4 is controlled by an external driving device, and the rotation and expansion of the forming tool 2 are driven by the driven sheath 4, thereby realizing the processing and forming of the stepped hole 10.

Claims

1. A multi-stage stepped hole turning device for a reversing valve body, comprising a forming tool and a tool body, characterized in that: It also includes a main scabbard and a driven scabbard, the forming tool is arranged in the main scabbard, the main scabbard includes an arc-shaped first scabbard body and a second scabbard body, the second scabbard body is arranged on the inner side of the first scabbard body, the axis of the first scabbard body is coaxial with the stepped hole to be formed in the valve body of the reversing valve, the forming tool is axially displaced under the action of the second scabbard body so that the cutting edge of the forming tool expands relative to the axis of the stepped hole when it rotates; the driven scabbard is sleeved on the outside of the main scabbard, and a guide groove is provided on the driven scabbard, the guide groove includes an engaging portion and a limiting portion, the forming tool is engaged in the engaging portion so that the forming tool is driven to rotate synchronously when the driven scabbard rotates, and the limiting portion achieves the effect of limiting the rotation angle of the driven scabbard by abutting against the first scabbard body.

2. The multi-stage stepped hole turning device for a reversing valve body according to claim 1 is characterized in that: The limiting portion includes a first limiting point and a second limiting point, wherein the first limiting point limits the angle of the forming tool being turned out by abutting against the upper end of the first sheath body, and the second limiting point limits the angle of the forming tool being retracted by abutting against the lower end of the first sheath body.

3. The multi-stage stepped hole turning device for a reversing valve body according to claim 1 is characterized in that: The tool body is provided with a moving device for driving the forming tool to move forward and backward, and the moving device comprises a rack shaft and a cylindrical gear. The rack shaft is connected to the end of the forming tool away from the cutting edge, and the cylindrical gear is meshed with the rack on the rack shaft.

4. The multi-stage stepped hole turning device for a reversing valve body according to claim 1, characterized in that: A driving device for driving the movable scabbard to rotate is arranged outside the driven scabbard.

5. The multi-stage stepped hole turning device for a reversing valve body according to claim 1, characterized in that: The forming tool has a plurality of cutting edges which are arranged at intervals.

6. The multi-stage stepped hole turning device for a reversing valve body according to claim 1, characterized in that: The lathe processing device further comprises a tapered shank, and the tapered shank is arranged at the rear end of the tool body.

7. The multi-stage stepped hole machining device for a reversing valve body according to claim 1, characterized in that: The main scabbard is fixed on the knife companion body through an end face pressure plate.

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