A machining device for a stepped hole reference swash plate without correction

Abstract

This utility model belongs to the field of mechanical manufacturing technology and relates to a machining device for a stepped hole reference swashplate without calibration. It includes a fixed base, a first positioning block, and a second positioning block. A support angle inclined surface is provided on one side of the upper part of the fixed base, and a positioning groove is provided on the top end face of the fixed base. A positioning mandrel perpendicular to the support angle inclined surface is fixedly installed on the support angle inclined surface. A stepped positioning mandrel and a sleeve are provided on the positioning mandrel, and the stepped positioning mandrel and sleeve are fixed by clamping bolts. The first positioning block is connected to the second positioning block. The first positioning block is placed in the positioning groove and has a clearance fit with the positioning groove. The second positioning block is placed in the inclined groove of the swashplate and has a clearance fit with the inclined groove of the swashplate. This machining device can effectively position the stepped hole as the central theoretical reference, simplifying the calibration method and improving machining efficiency while ensuring the machining accuracy of the swashplate.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical manufacturing technology and relates to a machining device for a stepped hole reference swashplate that does not require calibration. Background Technology

[0002] With the rapid development of mechanical technology, the performance requirements of hydraulic piston pumps are also gradually increasing. The swashplate, as one of its core components, plays a crucial role in hydraulic and mechanical engineering, whether converting rotary motion into reciprocating motion, adjusting displacement and oil supply direction, or bearing axial force. Currently, due to the stepped structure of the swashplate's center, its use as an angular reference in multi-process machining leads to the accumulation of systematic errors regardless of which section of the hole is used as the correction reference. Furthermore, the short reference of the swashplate itself results in low horizontal reference correction accuracy. Therefore, it is difficult to meet the process dimensional requirements of high-precision swashplate grooves in terms of dimensional accuracy, positional tolerances, and shape tolerances. The correction process is also cumbersome, resulting in low overall part processing efficiency and difficulty in controlling batch quality consistency.

[0003] In summary, it is necessary to design a method that can solve the correction problems caused by the datum of the swash plate step hole and its own short angular datum, while ensuring the accuracy requirements of various process dimensions of the angular swash plate. By simplifying the processing steps, the processing efficiency can be improved while ensuring the processing quality. Utility Model Content

[0004] The purpose of this utility model is:

[0005] This invention provides a machining device for a stepped hole reference swashplate that does not require calibration. This device can effectively locate the stepped hole, which serves as the central theoretical reference, and simplifies the calibration method while ensuring the machining accuracy of the swashplate, thereby improving machining efficiency.

[0006] Technical solution:

[0007] A machining device for a stepped hole reference swashplate without calibration includes a fixed base, a first positioning block, and a second positioning block. A support angle inclined surface is provided on one side of the upper part of the fixed base, and a positioning groove is provided on the top end face of the fixed base. A positioning mandrel perpendicular to the support angle inclined surface is fixedly installed on the support angle inclined surface. A stepped positioning mandrel and a sleeve are provided on the positioning mandrel, and the stepped positioning mandrel and sleeve are fixed by clamping bolts. The first positioning block is connected to the second positioning block. The first positioning block is placed in the positioning groove and has a clearance fit with the positioning groove. The second positioning block is placed in the inclined groove of the swashplate and has a clearance fit with the inclined groove of the swashplate.

[0008] Furthermore, the positioning mandrel has a threaded hole at its center for threaded connection with the clamping bolt.

[0009] Furthermore, both the step positioning mandrel and the sleeve have a central through hole, and the clamping bolt passes through the central through hole of the positioning mandrel and the sleeve and is screwed into the threaded hole of the positioning mandrel.

[0010] Furthermore, the clamping bolts are fitted with the positioning mandrel and the central through hole of the sleeve with clearance.

[0011] Furthermore, the complementary angle between the inclined surface of the support angle and the central axis of the fixed base is not greater than ±5 minutes of the nominal dimension of the inclined surface of the part.

[0012] Furthermore, the symmetry between the central axis of the first positioning block along the length direction and the central axis of the second positioning block along the width direction is no greater than 0.003 mm.

[0013] Furthermore, the step positioning mandrel is a cylindrical structure with a cylindricity of no more than 0.005 mm.

[0014] Furthermore, the flatness of the left and right end faces of the positioning groove is no greater than 0.005 mm.

[0015] Beneficial effects

[0016] This utility model provides a machining device for step hole reference swashplates that requires no calibration. It is rationally designed and highly practical. Through a dual-combination positioning mandrel, it effectively and precisely positions the step hole of a part, solving the problem of large fluctuations in the machining accuracy of angle grooves caused by the difficulty in calibrating the reference datum of the step hole. Combined with the positioning of a matching rotating angular positioning block, it ensures the precision of the rotating angular groove machining, guaranteeing the required process dimensions. Relying on the angle control between the inclined plane and the plane of the machining device, it effectively transforms the machining of angle grooves into the machining of planar grooves. By optimizing the cutting angle, it provides a better and more stable machining state when cutting materials with high hardness, thereby improving machining accuracy, simplifying machining difficulty, and reducing the demand for machining equipment. It reduces the reliance on machining equipment from four-axis or higher to three-axis machining, thus reducing dependence on machining equipment. While ensuring machining quality, it improves machining efficiency and provides a guiding solution for the positioning and machining of similar step shaft reference parts. Attached Figure Description

[0017] Figure 1 A three-dimensional diagram of a machining device for a stepped hole reference swashplate that requires no calibration;

[0018] Figure 2 3D diagram of the positioning block assembly

[0019] Figure 3 3D diagram of the second step datum positioning assembly for the part

[0020] Figure 4 A schematic diagram of a machining device for step hole reference swashplate that requires no calibration.

[0021] Figure 5 Schematic diagram of the part

[0022] The components are: 1-fixed base, 2-support angle inclined surface, 3-positioning mandrel, 4-positioning groove, 5-first positioning block, 6-second positioning block, 7-step positioning mandrel, 8-sleeve, 9-center through hole, and 10-clamping bolt. Detailed implementation method:

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific examples:

[0025] This utility model provides a machining device for a stepped hole reference swashplate that requires no calibration, comprising: a fixed base 1, a supporting angle inclined surface 2, a positioning mandrel 3, a positioning groove 4, a first positioning block 5, a second positioning block 6, a stepped positioning mandrel 7, a sleeve 8, a central through hole 9, and a clamping bolt 10. The outer diameter of the fixed base 1 serves as the end face of the three-jaw clamping machining device, and the upper part is provided with the supporting angle inclined surface 2, which serves as the inclined surface supporting the swashplate and transforms the swashplate's inclined groove cutting process into a planar groove processing. The upper end face of the fixed base 1 has a positioning groove 4. A positioning mandrel 3, perpendicular to the supporting angle inclined surface 2, is fixedly installed on the supporting angle inclined surface 2 for positioning the first stepped hole of the part and for preventing the part from sliding off the angle inclined surface when not tightened. The positioning mandrel 3 has a threaded hole in its center for threaded connection with the clamping bolt 10. A second positioning block 6 is fixedly installed at one end of the first positioning block 5. The first positioning block 5 is placed in the positioning groove 4 and has a clearance fit with the positioning groove 4, serving as the angular orientation reference for the inclined groove. The second positioning block 6 is placed in the inclined groove of the swashplate and has a clearance fit with the inclined groove of the swashplate, used for angular reference positioning of the inclined groove, thereby achieving the effect of eliminating angular correction. The stepped positioning mandrel 7 and sleeve 8 are installed on the positioning mandrel 3 by clamping bolts 10, used for positioning the second stepped hole of the part, and the sleeve 8 is used to extend the clamping position point, thereby facilitating the fixing and clamping of the part.

[0026] The stepped positioning mandrel 7 and sleeve 8 have a central through hole 9, which maintains a good gap with the outer diameter of the thread of the clamping bolt 10, and is used for penetration and guidance during the clamping process of the parts.

[0027] In this process, the first positioning block 5 is first placed into the positioning groove 4, and the part is adjusted in the angular position so that the part groove is engaged in the second positioning block 6, thereby completing the angular reference positioning of the part.

[0028] The complementary angle between the support angle inclined plane 2 and the central axis of the fixed base 1 is not greater than ±5 minutes of the nominal dimension of the inclined plane of the part, and is used to convert the part from the inclined plane cutting state to the plane cutting state.

[0029] The symmetry between the central axis of the first positioning block 5 along the length direction and the central axis of the second positioning block 6 along the width direction is no greater than 0.003 mm, which is used for angular positioning of the part without correction.

[0030] The cylindricity of the step positioning mandrel 7 is no greater than 0.005 mm, and it is used for the precise positioning of the second step hole of the part.

[0031] The flatness of the left and right end faces of the positioning groove 4 is no greater than 0.005mm, which is used for the horizontal reference correction of the processing device and the precise cooperation with the first positioning block 5, thereby improving the processing accuracy.

[0032] This utility model provides a machining device for step hole reference swashplates that requires no calibration. It is rationally designed and highly practical. Through a dual-combination positioning mandrel, it effectively and precisely positions the step hole of a part, solving the problem of large fluctuations in the machining accuracy of angle grooves caused by the difficulty in calibrating the reference datum of the step hole. Combined with the positioning of a matching rotating angular positioning block, it ensures the precision of the rotating angular groove machining, guaranteeing the required process dimensions. Relying on the angle control between the inclined plane and the plane of the machining device, it effectively transforms the machining of angle grooves into the machining of planar grooves. By optimizing the cutting angle, it provides a better and more stable machining state when cutting materials with high hardness, thereby improving machining accuracy, simplifying machining difficulty, and reducing the demand for machining equipment. It reduces the reliance on machining equipment from four-axis or higher to three-axis machining, thus reducing dependence on machining equipment. While ensuring machining quality, it improves machining efficiency and provides a guiding solution for the positioning and machining of similar step shaft reference parts.

[0033] Please see Figure 4 The usage process of this utility model is as follows:

[0034] 1. First, use a three-jaw clamp to clamp the outer diameter of the fixed base 1, and then perform horizontal correction on either the left or right side of the positioning groove 4 to complete the horizontal reference positioning of the processing device.

[0035] 2. Place the first step hole of the part into the positioning mandrel 3, roughly align the part's inclined groove with the positioning groove 4, and apply pressure to the part to keep it in contact with the support angle inclined surface 2.

[0036] 3. Place the step positioning mandrel 7 into the second step hole of the part, and use the clamping bolt 10 to pass through the central through hole 9 and the second step hole of the part in turn, and then screw it into the central threaded hole of the positioning mandrel 3.

[0037] 4. Place the first positioning block 5 into the positioning groove 4, and rotate the part to embed the second positioning block 6 into the inclined groove of the part. Then tighten the clamping bolt 10 to fix it. Take out the positioning block combination formed by the first positioning block 5 and the second positioning block 6. After the overall part is clamped and fixed, perform processing according to the requirements of each process dimension.

[0038] This utility model has many specific applications. The above description is only a preferred embodiment of this patent and does not limit the implementation method and protection scope of this patent. For those skilled in the art, the solutions obtained by making equivalent substitutions and obvious changes under the premise of the principle of this patent should be included in the protection scope of the patent.

Claims

1. A machining apparatus for step hole reference swashplate without calibration, characterized in that, The device includes a fixed base (1), a first positioning block (5), and a second positioning block (6). The fixed base (1) has a support angle inclined surface (2) on one side of its upper part and a positioning groove (4) on the top end face of the fixed base (1). A positioning mandrel (3) perpendicular to the support angle inclined surface (2) is fixedly installed on the support angle inclined surface (2). A stepped positioning mandrel (7) and a sleeve (8) are provided on the positioning mandrel (3). The stepped positioning mandrel (7) and the sleeve (8) are fixed by clamping bolts (10). The first positioning block (5) is connected to the second positioning block (6). The first positioning block (5) is placed in the positioning groove (4) and has a clearance fit with the positioning groove (4). The second positioning block (6) is placed in the inclined groove of the swashplate and has a clearance fit with the inclined groove of the swashplate.

2. The machining apparatus for step hole reference swashplate without correction according to claim 1, characterized in that, The positioning mandrel (3) has a threaded hole at its center for threaded connection with the clamping bolt (10).

3. The machining apparatus for step hole reference swashplate without correction according to claim 2, characterized in that, The step positioning mandrel (7) and the sleeve (8) are both provided with a central through hole (9). The clamping bolt (10) passes through the central through hole (9) of the step positioning mandrel (7) and the sleeve (8) and is screwed into the threaded hole of the positioning mandrel (3).

4. The machining apparatus for step hole reference swashplate without correction according to claim 3, characterized in that, The clamping bolt (10) is clearance-fitted with the step positioning mandrel (7) and the central through hole (9) of the sleeve (8).

5. The machining apparatus for step hole reference swashplate without correction according to claim 1, characterized in that, The complementary angle between the support angle inclined plane (2) and the central axis of the fixed base (1) is not greater than ±5 minutes of the nominal dimension of the inclined plane of the part.

6. The machining apparatus for step hole reference swashplate without correction according to claim 1, characterized in that, The symmetry between the central axis of the first positioning block (5) along the length direction and the central axis of the second positioning block (6) along the width direction is no greater than 0.003 mm.

7. The machining apparatus for step hole reference swashplate without correction according to claim 1, characterized in that, The step positioning mandrel (7) is a cylindrical structure with a cylindricity of no more than 0.005 mm.

8. The machining apparatus for step hole reference swashplate without correction according to claim 1, characterized in that, The flatness of the left and right end faces of the positioning groove (4) is no greater than 0.005 mm.

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