Tool for machining slender shaft workpiece with high form and location tolerance by adopting vertical machining center

Abstract

The invention discloses a tool for machining a slender shaft type workpiece with high form and location tolerance by adopting a vertical machining center. The tool comprises a clamp bottom plate, a clamping device and a clamping device, wherein the clamp bottom plate is mounted on a workbench of the vertical machining center; the bottom of the clamp vertical plate is mounted on the clamp bottom plate, and the clamp vertical plate extends upwards; the expansion sleeve assembly is installed on the clamp bottom plate, penetrates through a center hole of the slender shaft workpiece to be machined and is used for centering the slender shaft workpiece to be machined; the angular clamping assembly is mounted at a proper position in the middle of the clamp vertical plate, is used for clamping the slender workpiece to be machined, and is used for clamping the slender workpiece to be machined and limiting the circumferential rotation of the slender workpiece to be machined; the bottom supporting assembly and the inclined supporting assembly are installed on the upper portion of the clamp vertical plate and used for clamping the upper end of the thin and long workpiece to be machined. The problem that high form and position work difference cannot be achieved when existing equipment is used for machining specific workpieces is solved.

Description

Technical Field

[0001] The invention relates to the technical field of machining high-shape and position tolerance slender shaft workpieces, and in particular to a tool for machining high-shape and position tolerance slender shaft workpieces using a vertical machining center. Background Art

[0002] At present, a kind of slender shaft workpiece is processed. Due to the special installation position of the slender shaft workpiece, its high shape and position tolerance requirements cannot be achieved by converting the reference and processing methods. There is a problem that the high shape and position tolerance cannot be achieved when processing specific workpieces using existing equipment. Summary of the invention

[0003] The purpose of the present invention is to solve the problem that high geometric tolerance cannot be achieved when machining specific workpieces using existing equipment, and to provide a tool for machining high geometric tolerance slender shaft workpieces using a vertical machining center.

[0004] To achieve the above-mentioned purpose, the tooling of the present invention for machining high-shape and position tolerance slender shaft workpieces using a vertical machining center comprises:

[0005] A fixture base plate mounted on a worktable of a vertical machining center;

[0006] A fixture vertical plate with a bottom portion mounted on the fixture bottom plate and extending upward;

[0007] An expansion sleeve assembly mounted on the fixture bottom plate and passing through the center hole of the slender shaft workpiece to be processed, the expansion sleeve assembly is used to center the slender shaft workpiece to be processed;

[0008] An angular clamping assembly installed at an appropriate position in the middle of the fixture vertical plate and used to clamp the slender workpiece to be processed. The angular clamping assembly clamps the slender workpiece to be processed and limits the circumferential rotation of the slender workpiece to be processed;

[0009] A bottom support assembly and an oblique support assembly installed on the upper portion of the fixture vertical plate and used to clamp the upper end of the slender workpiece to be processed;

[0010] The clamping point between the angular clamping assembly and the slender shaft workpiece to be processed, the supporting point between the bottom support assembly and the slender shaft workpiece to be processed, and the supporting point between the oblique support assembly and the slender shaft workpiece to be processed are located on the same circumference and form concentric circles with the outer circumference of the expansion sleeve assembly.

[0011] In a preferred embodiment of the present invention, the expansion sleeve assembly comprises:

[0012] An axial tensioning cylinder mounted on the bottom plate of the fixture;

[0013] A pull rod whose lower end is drivingly connected to the tensioning cylinder;

[0014] A positioning mandrel sleeved on the pull rod, wherein the upper end of the pull rod passes through the upper end of the positioning mandrel;

[0015] An axial centering block, an axial centering spring, and an axial positioning seat are sequentially sleeved on the positioning core shaft from top to bottom;

[0016] An expansion sleeve is sleeved on the upper end of the pull rod; when the pull rod is driven by the axial tensioning cylinder to move downward, the expansion sleeve is driven to expand outward, and when the pull rod is driven by the axial tensioning cylinder to move upward, the expansion sleeve is driven to contract inward; when in use, the center hole of the slender shaft workpiece to be processed is sleeved on the expansion sleeve and the positioning core shaft.

[0017] In a preferred embodiment of the present invention, the axial tensioning cylinder is positioned and installed on the fixture bottom plate through a tensioning cylinder positioning seat.

[0018] In a preferred embodiment of the present invention, the angular clamping assembly comprises:

[0019] A radial tensioning cylinder is installed at an appropriate position in the middle of the fixture vertical plate;

[0020] A radial clamping block hinged on the cylinder body of the radial tensioning oil cylinder, the radial clamping block is also drivingly connected to the tensioning rod of the radial tensioning oil cylinder;

[0021] A radial positioning bullet;

[0022] A radial positioning tightening screw is locked at an appropriate position in the middle of the fixture vertical plate through a radial tightening nut, and the radial positioning spring block is sleeved on the radial positioning tightening screw through a radial positioning spring and the stroke of the radial positioning spring block is limited by the radial positioning tightening screw and the radial positioning spring; one end of the radial positioning spring acts on the radial positioning tightening screw, and the other end acts on the radial positioning spring block; the radial positioning spring block cooperates with the radial clamping block to clamp the slender workpiece to be processed and limit the circumferential rotation of the slender workpiece to be processed.

[0023] In a preferred embodiment of the present invention, a radial positioning seat and an adjustment pad are provided between the clamp vertical plate and the radial clamping block, wherein the radial positioning seat is installed on the clamp vertical plate through the adjustment pad, and the radial positioning spring block, the radial positioning tensioning screw and the radial positioning spring pass through the radial positioning seat.

[0024] In a preferred embodiment of the present invention, the bottom support assembly includes a bottom support cylinder installed on the clamp vertical plate and a bottom support head driven by the bottom support cylinder, and the oblique support assembly includes an oblique support cylinder installed on the clamp vertical plate and an oblique support head driven by the oblique support cylinder.

[0025] In a preferred embodiment of the present invention, the axial tensioning cylinder, radial tensioning cylinder, bottom support cylinder and oblique support cylinder are supplied with oil by a hydraulic station, and the hydraulic station is controlled by a PLC.

[0026] In a preferred embodiment of the present invention, the fixture vertical plate is installed on the workbench of the vertical machining center through a fixture support plate.

[0027] Due to the adoption of the above technical solution, the present invention solves the problem that the existing equipment cannot achieve high shape and position tolerance when processing specific workpieces. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but the present invention is not limited to the scope of the embodiments.

[0029] Figure 1 The present invention is a structural schematic diagram of a tooling for machining slender shaft workpieces with high geometric tolerances using a vertical machining center.

[0030] Figure 2 for Figure 1 Side view of.

[0031] Figure 3 for Figure 2 AA section view. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0033] See also Figures 1 to 3 The tooling shown in the figure for machining slender shaft workpieces with high geometric tolerances using a vertical machining center includes a clamp base plate 2, a fixture support plate 3, a fixture vertical plate 4, an expansion sleeve assembly 27, an angular clamping assembly 28, a bottom support assembly 29 and an oblique support assembly 30.

[0034] The fixture base plate 1 is installed on the workbench 1 of the vertical machining center, and the fixture vertical plate 4 is installed on the fixture base plate 1 through the fixture support plate 3 and extends upward.

[0035] The expansion sleeve assembly 37 includes an axial tensioning cylinder 5 , an axial tensioning cylinder positioning seat 6 , a pull rod 8 , a positioning mandrel 12 , an axial centering block 11 , an axial centering spring 10 , an axial positioning seat 9 and an expansion sleeve 13 .

[0036] The axial tensioning cylinder 5 is positioned and installed on the fixture base plate 2 through the tensioning cylinder positioning seat 6, the axial positioning seat 9 is installed on the tensioning cylinder positioning seat 6, the pull rod 8 is movably installed on the axial positioning seat 9 and is driven and connected to the axial tensioning cylinder 5 through the pull rod connecting screw 7, and the positioning core shaft 12 is movably sleeved on the pull rod 8, so that the pull rod 8 can move up and down on the positioning core shaft 12, and the upper end of the pull rod 8 passes through the upper end of the positioning core shaft 12.

[0037] The axial centering block 11 and the axial centering spring 10 are sequentially sleeved on the positioning core shaft 12 from top to bottom, and the expansion sleeve 13 is sleeved on the upper end of the pull rod 8 through the pull rod screw 14. When the pull rod 8 is driven downward by the axial tensioning cylinder 5, the expansion sleeve 13 is driven to expand outward, and when the pull rod 8 is driven upward by the axial tensioning cylinder 5, the expansion sleeve 13 is driven to contract inward; when in use, the center hole of the slender shaft workpiece 41 to be processed is sleeved on the expansion sleeve 13 and the positioning core shaft 12, and when the expansion sleeve 13 expands outward, the inner wall of the center hole of the slender shaft workpiece 41 to be processed is tightened to center the slender shaft workpiece to be processed.

[0038] The angular clamping assembly 28 includes a radial tensioning cylinder 15, a radial clamping block 23, a radial positioning spring block 26, a radial positioning tensioning screw 24, a radial positioning seat 19 and an adjusting pad 20; the radial tensioning cylinder 15 is installed at an appropriate middle position of the clamp vertical plate 4, the radial clamping block 23 is hinged on the cylinder body of the radial tensioning cylinder 15, and the radial clamping block 23 is drivingly connected to the tension rod of the radial tensioning cylinder 15. In addition, a radial positioning seat 19 and an adjusting pad 20 are arranged between the clamp vertical plate 4 and the radial clamping block 23.

[0039] The radial positioning tensioning screw 24 is locked at an appropriate middle position of the clamp vertical plate 4 by a radial tensioning nut 23, and the radial positioning spring block 26 is sleeved on the radial positioning tensioning screw 24 by a radial positioning spring 25, and the travel of the radial positioning spring block 26 is limited by the radial positioning tensioning screw 24 and the radial positioning spring 25. The radial positioning spring block 26, the radial positioning tensioning screw 24 and the radial positioning spring 25 pass through the radial positioning seat 19.

[0040] One end of the radial positioning spring 25 acts on the radial positioning tensioning screw, and the other end acts on the radial positioning spring block 26; the radial positioning spring block 26 cooperates with the radial clamping block 23 to clamp the slender workpiece 41 to be processed, and limit the circumferential rotation of the slender workpiece 41 to be processed.

[0041] The bottom support assembly 29 and the oblique support assembly 30 are installed on the upper part of the fixture vertical plate 4 to clamp the upper end of the slender workpiece 31 to be processed; the clamping point between the angular clamping assembly 28 and the slender shaft workpiece 31 to be processed, the supporting point between the bottom support assembly 29 and the slender shaft workpiece 31 to be processed, and the supporting point between the oblique support assembly 30 and the slender shaft workpiece 11 to be processed are located on the same circumference and form concentric circles with the outer circumference of the positioning core shaft 12 in the expansion sleeve assembly 27.

[0042] The bottom support assembly 29 includes a bottom support cylinder 15 installed on the clamp vertical plate 4 through an auxiliary support cylinder seat 16 and a bottom support head 17 driven by the bottom support cylinder 15, and the diagonal support assembly 30 includes an diagonal support cylinder 30a installed on the clamp vertical plate 4 and an diagonal support head 30b driven by the diagonal support cylinder 30a.

[0043] The axial tensioning cylinder 5, the radial tensioning cylinder 15, the bottom supporting cylinder 39 and the oblique supporting cylinder 40 are supplied with oil by a hydraulic station which is controlled by a PLC.

[0044] The working principle of the present invention is as follows: after the slender shaft workpiece 31 to be processed is placed in the tooling for processing slender shaft workpieces with high shape and position tolerances using a vertical machining center, the first step is to roughly position the slender shaft workpiece 31 to be processed by the positioning mandrel 12, the second step is to drive the expansion sleeve 13 to expand outwards by the axial tensioning oil cylinder 5 and the pull rod 8, and the slender shaft workpiece 31 to be processed is centered by the action of the expansion sleeve 13 of the expansion sleeve assembly; the third step is that the radial tensioning oil cylinder 15 of the angular clamping assembly 28 starts to act, and the slender shaft workpiece 31 to be processed is pressed on the radial positioning spring block 26 with pre-adjusted spring force through the radial clamping block 23, and the circumferential rotation of the slender shaft workpiece 31 to be processed is controlled; the fourth step is that the bottom support assembly 29 and the oblique support assembly 30 act to press the upper end of the slender shaft workpiece 31 to be processed, and ensure that the center of the workpiece is always vertical. Through this tooling, it is possible to process slender shaft workpieces with high shape and position tolerances on a machining center.

[0045] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A tooling for machining high-shape and position tolerance slender shaft workpieces using a vertical machining center, characterized in that: include: A fixture base plate mounted on a worktable of a vertical machining center; A fixture vertical plate with a bottom portion mounted on the fixture bottom plate and extending upward; An expansion sleeve assembly mounted on the fixture bottom plate and passing through the center hole of the slender shaft workpiece to be processed, the expansion sleeve assembly is used to center the slender shaft workpiece to be processed; An angular clamping assembly installed at an appropriate position in the middle of the fixture vertical plate and used to clamp the slender workpiece to be processed. The angular clamping assembly clamps the slender workpiece to be processed and limits the circumferential rotation of the slender workpiece to be processed; A bottom support assembly and an oblique support assembly installed on the upper portion of the fixture vertical plate and used to clamp the upper end of the slender workpiece to be processed; The clamping point between the angular clamping assembly and the slender shaft workpiece to be processed, the supporting point between the bottom support assembly and the slender shaft workpiece to be processed, and the supporting point between the oblique support assembly and the slender shaft workpiece to be processed are located on the same circumference and form concentric circles with the outer circumference of the expansion sleeve assembly.

2. The tooling for machining high geometric tolerance slender shaft workpieces using a vertical machining center according to claim 1, characterized in that: The expansion sleeve assembly comprises: An axial tensioning cylinder mounted on the bottom plate of the fixture; A pull rod whose lower end is drivingly connected to the tensioning cylinder; A positioning mandrel sleeved on the pull rod, wherein the upper end of the pull rod passes through the upper end of the positioning mandrel; An axial centering block, an axial centering spring, and an axial positioning seat are sequentially sleeved on the positioning core shaft from top to bottom; An expansion sleeve is sleeved on the upper end of the pull rod; when the pull rod is driven by the axial tensioning cylinder to move downward, the expansion sleeve is driven to expand outward, and when the pull rod is driven by the axial tensioning cylinder to move upward, the expansion sleeve is driven to contract inward; when in use, the center hole of the slender shaft workpiece to be processed is sleeved on the expansion sleeve and the positioning core shaft.

3. The tooling for machining high geometric tolerance slender shaft workpieces using a vertical machining center according to claim 2, characterized in that: The axial tensioning oil cylinder is positioned and installed on the fixture bottom plate through a tensioning oil cylinder positioning seat.

4. The tooling for machining high geometric tolerance slender shaft workpieces using a vertical machining center according to claim 2, characterized in that: The angular clamping assembly comprises: A radial tensioning cylinder is installed at an appropriate position in the middle of the fixture vertical plate; A radial clamping block hinged on the cylinder body of the radial tensioning oil cylinder, the radial clamping block is also drivingly connected to the tensioning rod of the radial tensioning oil cylinder; A radial positioning bullet; A radial positioning tightening screw is locked at an appropriate position in the middle of the fixture vertical plate through a radial tightening nut, and the radial positioning spring block is sleeved on the radial positioning tightening screw through a radial positioning spring and the stroke of the radial positioning spring block is limited by the radial positioning tightening screw and the radial positioning spring; one end of the radial positioning spring acts on the radial positioning tightening screw, and the other end acts on the radial positioning spring block; the radial positioning spring block cooperates with the radial clamping block to clamp the slender workpiece to be processed and limit the circumferential rotation of the slender workpiece to be processed.

5. The tooling for machining high geometric tolerance slender shaft workpieces using a vertical machining center according to claim 4, characterized in that: A radial positioning seat and an adjusting pad are provided between the clamp vertical plate and the radial clamping block, wherein the radial positioning seat is installed on the clamp vertical plate through the adjusting pad, and the radial positioning spring block, the radial positioning tensioning screw and the radial positioning spring pass through the radial positioning seat.

6. The tooling for machining high geometric tolerance slender shaft workpieces using a vertical machining center according to claim 5, characterized in that: The bottom support assembly includes a bottom support cylinder installed on the fixture plate and a bottom support head driven by the bottom support cylinder, and the oblique support assembly includes an oblique support cylinder installed on the fixture plate and an oblique support head driven by the oblique support cylinder.

7. The tooling for machining high geometric tolerance slender shaft workpieces using a vertical machining center according to claim 6, characterized in that: The axial tensioning oil cylinder, radial tensioning oil cylinder, bottom support oil cylinder and oblique support oil cylinder are supplied with oil by a hydraulic station, and the hydraulic station is controlled by a PLC.

8. The tooling for machining high geometric tolerance slender shaft workpieces using a vertical machining center according to claim 7, characterized in that: The fixture vertical plate is installed on the workbench of the vertical machining center through a fixture supporting plate.

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