CN111215852B - Machining method for cylinder body of double-piston oil cylinder - Google Patents
Machining method for cylinder body of double-piston oil cylinder Download PDFInfo
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- CN111215852B CN111215852B CN202010073556.9A CN202010073556A CN111215852B CN 111215852 B CN111215852 B CN 111215852B CN 202010073556 A CN202010073556 A CN 202010073556A CN 111215852 B CN111215852 B CN 111215852B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B41/00—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1404—Characterised by the construction of the motor unit of the straight-cylinder type in clusters, e.g. multiple cylinders in one block
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1428—Cylinders
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Abstract
The disclosure provides a method for machining a cylinder body of a double-piston oil cylinder, and belongs to the field of machining. The method comprises the following steps: processing a cylinder body blank of the double-piston oil cylinder into a cylinder body, wherein the cylinder body comprises two cylinders and a mounting flat plate, an inner hole of each cylinder is used for arranging a piston, the two cylinders are arranged side by side, and the mounting flat plate is clamped between the two cylinders; detecting whether planes where center lines of inner holes of the two cylinders are located are perpendicular to a first reference plane and a second reference plane respectively, wherein the first reference plane is a plane where the installation flat plate is in contact with the outer wall of the first cylinder, the second reference plane is a plane where the installation flat plate is in contact with the outer wall of the second cylinder, and the first reference plane is opposite to the second reference plane; and when the planes of the central lines of the inner holes of the two cylinders are not perpendicular to the first reference surface and the second reference surface respectively, processing the first reference surface and the second reference surface respectively until the planes of the central lines of the inner holes of the two cylinders are perpendicular to the first reference surface and the second reference surface respectively.
Description
Technical Field
The disclosure relates to the field of machining, in particular to a machining method for a cylinder body of a double-piston oil cylinder.
Background
The oil cylinder (also called as hydraulic cylinder) comprises a cylinder body and a piston, and a piston hole for accommodating the piston is arranged on the cylinder body. When the cylinder body is machined, generally, the mounting surface of the oil cylinder (located on the outer wall of the cylinder body) is machined, and then the piston hole is machined in the cylinder body by taking the mounting surface as a reference surface.
For an oil cylinder provided with two pistons (hereinafter referred to as a double-piston oil cylinder), the cylinder body comprises two piston cylinders, the two piston cylinders are arranged side by side, the opening directions and the length directions of piston holes of the two piston cylinders are the same, a connecting plate is clamped between the two piston cylinders, the plane of the connecting plate, which is in contact with the piston cylinders, is an installation surface of the oil cylinder, and the plane of the central lines of the two piston holes is generally required to be perpendicular to the installation surface.
In the process of machining the cylinder body of the double-piston oil cylinder, due to workpiece deformation, machine tool errors and the like, after the piston holes are machined by taking the mounting surface as a reference surface, the perpendicularity between the plane where the central lines (axes) of the two piston holes are located and the mounting surface is out of tolerance.
Disclosure of Invention
The embodiment of the disclosure provides a method for processing a cylinder body of a double-piston oil cylinder, which can ensure that planes of center lines of inner holes of two cylinders are respectively perpendicular to a reference plane. The technical scheme is as follows:
the invention provides a cylinder body processing method of a double-piston oil cylinder, which comprises the following steps:
processing a cylinder body blank of a double-piston oil cylinder into a cylinder body, wherein the cylinder body comprises two cylinders and a mounting flat plate, each cylinder in the two cylinders is a bottom-sealing cylinder, an inner hole of each cylinder is used for arranging a piston, the two cylinders are arranged side by side, the length directions of the two cylinders are the same, the openings of the inner holes of the two cylinders are aligned, and the mounting flat plate is clamped between the two cylinders;
detecting whether planes where center lines of inner holes of the two cylinders are located are perpendicular to a first reference plane and a second reference plane respectively, wherein the first reference plane is a surface of the installation flat plate contacting with the outer wall of the first cylinder, the first cylinder is one of the two cylinders, the second reference plane is a surface of the installation flat plate contacting with the outer wall of the second cylinder, the second cylinder is the other one of the two cylinders, and the first reference plane is opposite to the second reference plane;
and when the planes of the central lines of the inner holes of the two cylinders are not perpendicular to the first reference plane and the second reference plane respectively, processing the first reference plane and the second reference plane respectively until the planes of the central lines of the inner holes of the two cylinders are perpendicular to the first reference plane and the second reference plane respectively.
Optionally, the detecting whether planes in which center lines of inner holes of the two cylinders are located are perpendicular to the first reference plane and the second reference plane respectively includes:
measuring a distance from the first reference plane to a center of an inner bore opening of the first cylinder;
measuring a distance from the second reference surface to a center of an inner bore opening of the second cylinder;
and when the difference between the distance from the first reference surface to the center of the inner hole opening of the first cylinder and the distance from the second reference surface to the center of the inner hole opening of the second cylinder is smaller than a target distance difference value, determining that planes of the center lines of the inner holes of the two cylinders are respectively vertical to the first reference surface and the second reference surface.
Optionally, the measuring a distance from the first reference plane to a center of an inner bore opening of the first cylinder comprises:
placing the cylinder body on a workbench of a boring machine, wherein the first reference surface is horizontally upward, and the first cylinder is positioned above the second cylinder;
adjusting the position of the cylinder body to enable the inner hole openings of the two cylinders to face to a main shaft of the boring machine;
determining that the plane of the central lines of the inner holes of the two cylinders is vertical to the main shaft of the boring machine and parallel to the Y axis of the boring machine;
and when the planes of the central lines of the inner holes of the two cylinders are perpendicular to the main shaft of the boring machine and parallel to the Y axis of the boring machine, measuring the distance from the first reference surface to the center of the opening of the inner hole of the first cylinder by using a dial indicator.
Optionally, the cylinder block machining method further includes:
when the planes of the central lines of the inner holes of the two cylinders are not perpendicular to the main shaft of the boring machine and are not parallel to the Y axis of the boring machine, the position of the cylinder body relative to the main shaft is adjusted until the planes of the central lines of the inner holes of the two cylinders are perpendicular to the main shaft of the boring machine and are parallel to the Y axis of the boring machine.
Optionally, the determining that the plane on which the central lines of the inner holes of the two cylinders are located is perpendicular to the main shaft of the boring machine and parallel to the Y axis of the boring machine includes:
determining coordinates of centers of inner hole openings of the two cylinders, wherein the coordinates comprise X-axis coordinates of the boring machine;
and when the difference value of the X-axis coordinates in the coordinates of the centers of the openings of the inner holes of the two cylinders is smaller than the target coordinate difference value, determining that the plane of the center lines of the inner holes of the two cylinders is parallel to the Y axis of the boring machine.
Optionally, determining coordinates of a center of an inner bore opening of a first cylinder of the two cylinders comprises:
installing a dial indicator on a main shaft of the boring machine;
adjusting the position of the main shaft to enable a detection head of the dial indicator to be abutted against the inner peripheral wall of the inner hole of the first cylinder;
rotating the main shaft for at least one circle, and observing the reading of the dial indicator;
and taking the coordinate of the boring machine when the reading change amplitude of the dial indicator is minimum as the coordinate of the center of the inner hole opening of the first cylinder.
Optionally, the measuring, by a dial indicator, a distance from the first reference plane to a center of an inner hole opening of the first cylinder includes:
mounting the dial indicator on a main shaft of the boring machine;
adjusting the position of the spindle to enable a detection head of the dial indicator to be in contact with the first reference surface;
when the reading of the dial indicator is 0, recording a Y-axis coordinate Y1 of the boring machine;
adjusting the position of the main shaft to enable a detection head of the dial indicator to be in contact with the lowest point of the inner hole opening of the first cylinder;
when the reading of the dial indicator is 0, recording a Y-axis coordinate Y2 of the boring machine;
measuring the diameter d of the inner hole of the first cylinder;
and calculating the distance L from the first reference surface to the center of the inner hole opening of the first cylinder, wherein the distance L is Y2-Y1+ d/2.
Optionally, processing the first reference surface includes:
rotating the table by 90 DEG, milling a first reference surface on one side of the first cylinder;
rotating the workbench by 180 degrees, and milling a first reference surface on the other side of the first cylinder;
determining the flatness of first reference surfaces located on two sides of the first cylinder;
and when the planeness of the first reference surfaces positioned at the two sides of the first cylinder is smaller than the target planeness, finishing the processing of the first reference surfaces.
Optionally, determining the flatness of a first reference plane located on one side of the first cylinder comprises:
adjusting the position of the workbench to enable the inner hole openings of the two cylinders to face to a spindle of the boring machine;
installing a dial indicator on the main shaft;
adjusting the position of the main shaft to enable a detection head of the dial indicator to be in contact with a first reference surface located on one side of the first cylinder;
driving a detection head of the dial indicator to linearly move on a first reference surface positioned on one side of the first cylinder along the length direction of the first cylinder, and observing the reading of the dial indicator;
and taking the reading change amplitude of the dial indicator as the flatness of a first reference surface positioned on one side of the first cylinder.
Optionally, the installing the dial indicator on the spindle includes:
and the dial indicator is adsorbed on the main shaft through the magnetic base.
The technical scheme provided by the embodiment of the disclosure has the following beneficial effects:
processing a cylinder body blank of the double-piston oil cylinder into a cylinder body, wherein the cylinder body comprises two cylinders and a mounting flat plate, each cylinder in the two cylinders is a bottom-sealing cylinder, an inner hole of each cylinder is used for arranging a piston, the two cylinders are arranged side by side, the length directions of the two cylinders are the same, the inner hole openings of the two cylinders are aligned, and the mounting flat plate is clamped between the two cylinders; detecting whether planes where center lines of inner holes of the two cylinders are located are perpendicular to a first reference plane and a second reference plane respectively, wherein the first reference plane is a plane where the mounting flat plate is in contact with the outer wall of the first cylinder, the first cylinder is one of the two cylinders, the second reference plane is a plane where the mounting flat plate is in contact with the outer wall of the second cylinder, the second cylinder is the other of the two cylinders, and the first reference plane is opposite to the second reference plane; when the planes of the central lines of the inner holes of the two cylinders are not perpendicular to the first reference plane and the second reference plane respectively, the first reference plane and the second reference plane are processed respectively until the planes of the central lines of the inner holes of the two cylinders are perpendicular to the first reference plane and the second reference plane respectively; therefore, after the cylinder body is machined, if the planes of the central lines of the inner holes of the two cylinders are not perpendicular to the first reference surface and the second reference surface respectively, the first reference surface and the second reference surface are machined again to ensure that the planes of the central lines of the inner holes of the two cylinders are not perpendicular to the first reference surface and the second reference surface respectively, the yield of cylinder body machining is improved, and the installation requirement of the cylinder body is met.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 and fig. 2 are schematic structural diagrams of a cylinder body of a dual-piston oil cylinder provided in the embodiment of the present disclosure;
FIG. 3 is a flow chart of a method for processing a cylinder body of a dual-piston cylinder according to an embodiment of the present disclosure;
fig. 4 is a flowchart of a method for processing a cylinder body of a dual-piston oil cylinder according to an embodiment of the present disclosure.
In the drawings, the reference numbers of the various parts are as follows:
1 cylinder body, 2 first cylinder, 3 second cylinder, 4 installation flat plate, 4a first reference surface, 4b second reference surface, 5 inner holes, 5a inner hole opening, 6 flange, 7 bush, 81 jack and 82V-shaped iron.
Detailed Description
To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.
Fig. 1 and fig. 2 are schematic structural diagrams of a cylinder body of a dual-piston cylinder provided in an embodiment of the present disclosure. Referring to fig. 1 and 2, the cylinder body of the double piston cylinder includes two cylinders and a mounting plate 4. Each of the two cylinders is a bottom-sealed cylinder, and an inner hole 5 (a blind hole, also called a piston hole) of each cylinder is used for arranging a piston; the two cylinders are arranged side by side, the length directions of the two cylinders are the same, and the inner hole openings 5a of the two cylinders are aligned. The mounting plate 4 is sandwiched between two cylinders.
The two cylinders comprise a first cylinder 2 and a second cylinder 3. The mounting plate 4 is used to mount the cylinder block 1 to other objects. The surface (first reference surface 4a) of the mounting plate 4 that contacts the outer wall of the first cylinder 2 and the surface (second reference surface 4b) of the mounting plate 4 that contacts the outer wall of the second cylinder 3 are both mounting surfaces of the cylinder 1 (surfaces on which the cylinder 1 is mounted to another object). Illustratively, according to the installation requirement of the cylinder body 1, the first reference surface 4a and the second reference surface 4b are parallel, and the planes of the central lines of the inner holes 5 of the two cylinders are respectively vertical to the first reference surface 4a and the second reference surface 4 b. In the embodiment of the present disclosure, after the cylinder block 1 is machined, if the planes of the center lines of the inner holes 5 of the two cylinders are not perpendicular to the first reference surface 4a and the second reference surface 4b, rework is required: and the first reference surface 4a and the second reference surface 4b are machined again, so that the planes of the central lines of the inner holes 5 of the two cylinders are perpendicular to the first reference surface 4a and the second reference surface 4b respectively after the machining is carried out again, and the first reference surface 4a and the second reference surface 4b are parallel.
Illustratively, the two cylinders are welded to the mounting plate 4, respectively.
Illustratively, the welding surface of each of the two cylinders with the mounting plate 4 is a plane. Thus, the outer contour of the cross section of the cylinder at the welding surface comprises an arc and a flat edge, and the two ends of the arc are respectively connected with the flat edge.
Illustratively, each of the two cylinders is sleeved with a flange 6, and the flange 6 is positioned at the opening of the inner hole 5 of the corresponding cylinder. The flange 6 lies in a plane perpendicular to the mounting plate 4. The flanges 6 of the two cylinders are arranged in alignment.
Illustratively, a gap is provided between the flanges 6 of the two cylinders.
Illustratively, the distance between the mounting plate 4 and the flange 6 is smaller than the distance between the mounting plate 4 and the bottom of the cylinder (the mounting plate 4 is close to the flange 6).
Illustratively, bushings 7 are respectively provided in the inner bores 5 of the two cylinders. The outer wall of the bush 7 is connected with the inner bore 5 wall of the corresponding cylinder.
In the disclosed embodiment, the boring machine may be a horizontal milling and boring machine (including functions of a milling machine and a boring machine), and the model of the boring machine may be TPS6113 or TPS6513, for example. The coordinates of the boring machine refer to coordinate values displayed by a control system of the boring machine and can indicate the position of the tool mounting in an XYZ coordinate system of the boring machine. In an XYZ coordinate system of the boring machine, the length direction of a main shaft is a Z-axis direction, the main shaft can move in the Y-axis direction and the Z-axis direction respectively, and a workbench can move in the X-axis direction and the Z-axis direction respectively.
Fig. 3 is a flowchart of a method for processing a cylinder body of a dual-piston cylinder according to an embodiment of the present disclosure, where the cylinder body of the dual-piston cylinder may be the cylinder body of the dual-piston cylinder shown in fig. 1 and fig. 2. Referring to fig. 3, the cylinder block processing method flow includes the following steps.
As shown in fig. 1 and 2, the cylinder body comprises two cylinders and a mounting plate, each of the two cylinders is a bottom-sealed cylinder, an inner hole of each cylinder is used for arranging a piston, the two cylinders are arranged side by side, the length directions of the two cylinders are the same, inner hole openings of the two cylinders are aligned, and the mounting plate is clamped between the two cylinders.
And 102, detecting whether planes where the center lines of the inner holes of the two cylinders are located are perpendicular to the first reference plane and the second reference plane respectively.
The first reference surface is a surface of the mounting flat plate contacting with the outer wall of the first cylinder, the first cylinder is one of the two cylinders, the second reference surface is a surface of the mounting flat plate contacting with the outer wall of the second cylinder, the second cylinder is the other of the two cylinders, and the first reference surface is opposite to the second reference surface.
And when the planes of the central lines of the inner holes of the two cylinders are not perpendicular to the first reference plane and the second reference plane respectively, executing the step 103. And when the planes of the central lines of the inner holes of the two cylinders are respectively vertical to the first reference surface and the second reference surface, the cylinder body is machined.
And 103, respectively processing the first reference surface and the second reference surface until the planes of the center lines of the inner holes of the two cylinders are respectively vertical to the first reference surface and the second reference surface.
In the embodiment of the disclosure, a cylinder body blank of a double-piston oil cylinder is processed into a cylinder body, the cylinder body comprises two cylinders and a mounting flat plate, each cylinder in the two cylinders is a bottom-sealing cylinder, an inner hole of each cylinder is used for arranging a piston, the two cylinders are arranged side by side, the length directions of the two cylinders are the same, the inner hole openings of the two cylinders are aligned, and the mounting flat plate is clamped between the two cylinders; detecting whether planes where center lines of inner holes of the two cylinders are located are perpendicular to a first reference plane and a second reference plane respectively, wherein the first reference plane is a plane where the mounting flat plate is in contact with the outer wall of the first cylinder, the first cylinder is one of the two cylinders, the second reference plane is a plane where the mounting flat plate is in contact with the outer wall of the second cylinder, the second cylinder is the other of the two cylinders, and the first reference plane is opposite to the second reference plane; when the planes of the central lines of the inner holes of the two cylinders are not perpendicular to the first reference plane and the second reference plane respectively, the first reference plane and the second reference plane are processed respectively until the planes of the central lines of the inner holes of the two cylinders are perpendicular to the first reference plane and the second reference plane respectively; therefore, after the cylinder body is machined, if the planes of the central lines of the inner holes of the two cylinders are not perpendicular to the first reference surface and the second reference surface respectively, the first reference surface and the second reference surface are machined again to ensure that the planes of the central lines of the inner holes of the two cylinders are not perpendicular to the first reference surface and the second reference surface respectively, the yield of cylinder body machining is improved, and the installation requirement of the cylinder body is met.
Fig. 4 is a flowchart of a method for processing a cylinder body of a dual-piston cylinder according to an embodiment of the present disclosure, where the cylinder body of the dual-piston cylinder may be the cylinder body of the dual-piston cylinder shown in fig. 1 and fig. 2. Referring to fig. 4, the cylinder block processing method flow includes the following steps.
As shown in fig. 1 and 2, the cylinder body comprises two cylinders and a mounting plate, each of the two cylinders is a bottom-sealed cylinder, an inner hole of each cylinder is used for arranging a piston, the two cylinders are arranged side by side, the length directions of the two cylinders are the same, inner hole openings of the two cylinders are aligned, and the mounting plate is clamped between the two cylinders.
The cylinder body blank can include installation flat board and two drums, and two drums respectively with installation flat board welded forming. Step 201 may include: the cylinder body blank is firstly placed on a workbench of a planomiller, the mounting surface of an oil cylinder (the surface of a mounting flat plate which is respectively contacted with the outer walls of two cylinders) is processed on the cylinder body blank, then two inner holes are processed on the cylinder body blank according to certain center height (the distance between the center of the end surface of the cylinder and the contacted mounting surface) by taking the mounting surface as a reference surface, and the requirement on the center height of a matched cylinder body (the two cylinders) is consistent in order to ensure that two pistons are parallel.
The first reference surface is a surface of the mounting flat plate contacting with the outer wall of the first cylinder, the first cylinder is one of the two cylinders, the second reference surface is a surface of the mounting flat plate contacting with the outer wall of the second cylinder, the second cylinder is the other of the two cylinders, and the first reference surface is opposite to the second reference surface.
Step 202 may include the following steps.
And step A, placing the cylinder body on a workbench of a boring machine.
When the cylinder body is placed on the workbench, the first reference surface faces upwards horizontally, and the first cylinder is located above the second cylinder.
Step a may comprise: the first reference surface of the cylinder body is horizontally upward and placed in the middle of a workbench of a boring machine, two jacks (shown by a number 81 in fig. 2) are used for respectively supporting two sides of a mounting flat plate of the cylinder body (a cushion block can be arranged between the jacks and the workbench), and V-shaped iron (shown by a number 82 in fig. 2) is used for supporting the bottom excircle of the second cylinder.
And step B, adjusting the position of the cylinder body to enable the inner hole openings of the two cylinders to face the spindle of the boring machine.
In this embodiment, the longitudinal direction of the main shaft is the Z-axis direction.
And step C, determining that the plane of the central lines of the inner holes of the two cylinders is vertical to the main shaft of the boring machine and is parallel to the Y axis of the boring machine.
And D, when the planes of the central lines of the inner holes of the two cylinders are not perpendicular to the main shaft of the boring machine and are not parallel to the Y axis of the boring machine (the planes of the central lines of the inner holes of the two cylinders are not perpendicular to the main shaft of the boring machine and the planes of the central lines of the inner holes of the two cylinders are not parallel to the Y axis of the boring machine), executing the step D. And E, when the planes of the central lines of the inner holes of the two cylinders are vertical to the main shaft of the boring machine and parallel to the Y axis of the boring machine (the planes of the central lines of the inner holes of the two cylinders are vertical to the main shaft of the boring machine and the planes of the central lines of the inner holes of the two cylinders are parallel to the Y axis of the boring machine), executing the step E.
Step C may include the following steps.
And step C1, determining the coordinates of the centers of the inner hole openings of the two cylinders, wherein the coordinates comprise the X-axis coordinates of the boring machine.
In the disclosed embodiment, the coordinates of the boring machine all refer to coordinate values displayed by the system of the boring machine, which include X-axis, Y-axis and Z-axis coordinate values. The manner in which the coordinates of the center of the bore opening of the first cylinder are determined is described in detail below and includes the following steps.
Firstly, mounting a dial indicator on a main shaft of a boring machine.
The dial indicator can be adsorbed on the main shaft through the magnetic base.
And secondly, adjusting the position of the main shaft or the workbench to enable the detection head of the dial indicator to be abutted against the inner peripheral wall of the inner hole of the first cylinder.
In the second step, the position of the main shaft can be moved in the Z-axis direction by moving the main shaft or moving the worktable, so that the center of the main shaft coincides with the center of the inner hole opening.
And thirdly, rotating the main shaft for at least one circle and observing the reading of the dial indicator.
And fourthly, taking the coordinate of the boring machine when the reading change amplitude of the dial indicator is minimum as the coordinate of the center of the inner hole opening of the first cylinder.
The determination manner of the coordinates of the centers of the inner hole openings of the two cylinders may be the same, and the determination manner of the coordinates of the centers of the inner hole openings of the second cylinder may refer to the first step to the fourth step, which is not described herein again.
And C2, comparing the difference value of the X-axis coordinate in the coordinates of the centers of the inner hole openings of the two cylinders with the target coordinate difference value.
When the difference value of the X-axis coordinates in the coordinates of the centers of the openings of the inner holes of the two cylinders is smaller than the difference value of the target coordinates, determining that the plane of the center lines of the inner holes of the two cylinders is perpendicular to the main shaft of the boring machine and parallel to the Y axis of the boring machine, and executing the step E; when the difference value of the X-axis coordinates in the coordinates of the centers of the openings of the inner holes of the two cylinders is larger than the difference value of the target coordinates, determining that the plane of the center lines of the inner holes of the two cylinders is not perpendicular to the main shaft of the boring machine and is not parallel to the Y axis of the boring machine, and executing the step D; when the difference between the X-axis coordinates in the coordinates of the centers of the inner hole openings of the two cylinders is equal to the target coordinate difference, step E may be performed, and step D may also be performed, which is not limited in this embodiment.
Illustratively, the target coordinate difference may be 0.01 mm.
And D, adjusting the position of the cylinder body relative to the main shaft until the plane of the center lines of the inner holes of the two cylinders is parallel to the Y axis of the boring machine.
The position of the cylinder body relative to the main shaft can be adjusted by adjusting the position of the workbench or adjusting the position of the main shaft. After adjusting the position of the cylinder relative to the main shaft, step a above may be re-executed.
And E, measuring the distance from the first reference surface to the center of the opening of the inner hole of the first cylinder through the dial indicator.
Step E may include the following steps.
And E1, mounting the dial indicator on the main shaft of the boring machine.
And E2, adjusting the position of the spindle to enable the detection head of the dial indicator to be in contact with the first reference surface.
And E3, recording the Y-axis coordinate Y1 of the boring machine when the dial indicator is read to be 0.
In step E3, the spindle may be rotated or the table may be moved on the Y axis to change the reading of the dial indicator, and when the reading of the dial indicator is 0, the Y axis coordinate Y1 of the boring machine at this time is recorded.
And E4, adjusting the position of the main shaft to enable the detection head of the dial indicator to be in contact with the lowest point of the opening of the inner hole of the first cylinder.
And E5, recording the Y-axis coordinate Y2 of the boring machine when the dial indicator is read to be 0.
And E6, measuring the inner hole diameter d of the first cylinder.
The inner bore diameter d of the first cylinder may be measured using an inside micrometer.
And E7, calculating the distance L from the first reference surface to the center of the inner hole opening of the first cylinder, wherein the L is Y2-Y1+ d/2.
The distance from the second reference surface to the center of the inner hole opening of the second cylinder is measured in the same manner as the distance from the first reference surface to the center of the inner hole opening of the second cylinder, please refer to step 202a above, and detailed description thereof is omitted.
And when the difference between the distance from the first reference surface to the center of the inner hole opening of the first cylinder and the distance from the second reference surface to the center of the inner hole opening of the second cylinder is larger than the target distance difference, determining that the planes of the center lines of the inner holes of the two cylinders are not perpendicular to the first reference surface and the second reference surface respectively, and executing step 203. And when the planes of the central lines of the inner holes of the two cylinders are respectively vertical to the first reference surface and the second reference surface, the cylinder body is machined.
Illustratively, the target distance difference may be 0.02 mm.
And step 203, processing the first reference surface and the second reference surface respectively until planes of center lines of inner holes of the two cylinders are perpendicular to the first reference surface and the second reference surface respectively.
Before the first reference surface is processed, ensuring that the first reference surface is horizontally upward, wherein the first cylinder is positioned above the second cylinder; before the second reference surface is processed, the second reference surface is ensured to be horizontally upward, and the second cylinder is positioned above the first cylinder. Before the first reference surface and the second reference surface are respectively processed, the openings of the inner holes of the two cylinders are ensured to face the spindle of the boring machine, and the planes of the center lines of the inner holes of the two cylinders are perpendicular to the spindle of the boring machine and parallel to the Y axis of the boring machine (see the steps A-C). In step 203, the processing of the first reference surface may include the following steps.
And a step a, adopting a pressure plate to press the cylinder body.
And pressing the cylinder body by using a pressing plate at a position which does not influence the measurement of the inner hole and the processing of the reference surface. Alternatively, the flange end face and the upper part of the outer circle of the lower cylinder can be respectively fixed by pressing plates.
And b, rotating the workbench by 90 degrees, and milling a first reference surface on one side of the first cylinder.
And c, rotating the workbench by 180 degrees, and milling a first reference surface positioned on the other side of the first cylinder.
The first datum surfaces on both sides of the first cylinder may be milled using a solid carbide end mill.
It should be noted that the rotation error of the boring machine is within 0.01 to ensure the machining precision.
And d, determining the planeness of the first reference surfaces positioned at the two sides of the first cylinder.
When the flatness of the first reference surfaces on the two sides of the first cylinder is smaller than the target flatness, the first reference surfaces on the two sides are coplanar, and at the moment, the first reference surfaces are machined. And when the flatness of the first reference surfaces positioned at the two sides of the first cylinder is larger than the target flatness, machining the first reference surfaces again.
Illustratively, the target flatness may be 0.02.
Step d may include the following steps.
And d-1, adjusting the position of the workbench to enable the inner hole openings of the two cylinders to face the spindle of the boring machine.
And d-2, mounting the dial indicator on the main shaft.
And d-3, adjusting the position of the main shaft to enable the detection head of the dial indicator to be in contact with the first reference surface on one side of the first cylinder.
And d-4, driving the detection head of the dial indicator to linearly move on a first reference surface positioned on one side of the first cylinder along the length direction of the first cylinder, and observing the reading of the dial indicator.
The detection head of the dial indicator can be driven to linearly move on the first reference surface positioned on one side of the first cylinder along the length direction of the first cylinder by controlling the main shaft of the boring machine to move in the Y-axis direction.
And d-5, repeating the steps for multiple times, and taking the reading change amplitude of the dial indicator as the flatness of the first reference surface positioned on one side of the first cylinder.
After the machining of the first reference surface and the second reference surface is completed, step 202 is executed again until the planes of the center lines of the inner holes of the two cylinders are perpendicular to the first reference surface and the second reference surface, respectively.
In the embodiment of the disclosure, a cylinder body blank of a double-piston oil cylinder is processed into a cylinder body, the cylinder body comprises two cylinders and a mounting flat plate, each cylinder in the two cylinders is a bottom-sealing cylinder, an inner hole of each cylinder is used for arranging a piston, the two cylinders are arranged side by side, the length directions of the two cylinders are the same, the inner hole openings of the two cylinders are aligned, and the mounting flat plate is clamped between the two cylinders; detecting whether planes where center lines of inner holes of the two cylinders are located are perpendicular to a first reference plane and a second reference plane respectively, wherein the first reference plane is a plane where the mounting flat plate is in contact with the outer wall of the first cylinder, the first cylinder is one of the two cylinders, the second reference plane is a plane where the mounting flat plate is in contact with the outer wall of the second cylinder, the second cylinder is the other of the two cylinders, and the first reference plane is opposite to the second reference plane; when the planes of the central lines of the inner holes of the two cylinders are not perpendicular to the first reference plane and the second reference plane respectively, the first reference plane and the second reference plane are processed respectively until the planes of the central lines of the inner holes of the two cylinders are perpendicular to the first reference plane and the second reference plane respectively; therefore, after the cylinder body is machined, if the planes of the central lines of the inner holes of the two cylinders are not perpendicular to the first reference surface and the second reference surface respectively, the first reference surface and the second reference surface are machined again to ensure that the planes of the central lines of the inner holes of the two cylinders are not perpendicular to the first reference surface and the second reference surface respectively, the yield of cylinder body machining is improved, and the installation requirement of the cylinder body is met.
The above description is intended to be exemplary only and not to limit the present disclosure, and any modification, equivalent replacement, or improvement made without departing from the spirit and scope of the present disclosure is to be considered as the same as the present disclosure.
Claims (9)
1. A cylinder body processing method of a double-piston oil cylinder is characterized by comprising the following steps:
processing a cylinder body blank of a double-piston oil cylinder into a cylinder body, wherein the cylinder body comprises two cylinders and a mounting flat plate, each cylinder in the two cylinders is a bottom-sealing cylinder, an inner hole of each cylinder is used for arranging a piston, the two cylinders are arranged side by side, the length directions of the two cylinders are the same, the inner hole openings of the two cylinders are aligned, the mounting flat plate is clamped between the two cylinders, the two cylinders comprise a first cylinder and a second cylinder, and the surfaces of the first cylinder and the second cylinder, which are in contact with the mounting flat plate, are planes;
measuring a distance from a first reference surface to a center of an inner bore opening of the first cylinder; measuring a distance from a second reference surface to a center of an inner bore opening of the second cylinder; when the difference between the distance from the first reference surface to the center of the inner hole opening of the first cylinder and the distance from the second reference surface to the center of the inner hole opening of the second cylinder is smaller than a target distance difference value, determining that the plane where the center lines of the inner holes of the two cylinders are located is perpendicular to the first reference surface and the second reference surface respectively, wherein the first reference surface is a surface where the mounting flat plate is in contact with the outer wall of the first cylinder, the first cylinder is one of the two cylinders, the second reference surface is a surface where the mounting flat plate is in contact with the outer wall of the second cylinder, the second cylinder is the other one of the two cylinders, and the first reference surface is opposite to the second reference surface;
and when the planes of the central lines of the inner holes of the two cylinders are not perpendicular to the first reference plane and the second reference plane respectively, processing the first reference plane and the second reference plane respectively until the planes of the central lines of the inner holes of the two cylinders are perpendicular to the first reference plane and the second reference plane respectively.
2. The cylinder block machining method according to claim 1, wherein the measuring a distance from the first reference surface to a center of an inner hole opening of the first cylinder includes:
placing the cylinder body on a workbench of a boring machine, wherein the first reference surface is horizontally upward, and the first cylinder is positioned above the second cylinder;
adjusting the position of the cylinder body to enable the inner hole openings of the two cylinders to face to a main shaft of the boring machine;
determining that the plane of the central lines of the inner holes of the two cylinders is vertical to the main shaft of the boring machine and parallel to the Y axis of the boring machine;
and when the planes of the central lines of the inner holes of the two cylinders are perpendicular to the main shaft of the boring machine and parallel to the Y axis of the boring machine, measuring the distance from the first reference surface to the center of the opening of the inner hole of the first cylinder by using a dial indicator.
3. The cylinder block machining method according to claim 2, further comprising:
when the planes of the central lines of the inner holes of the two cylinders are not perpendicular to the main shaft of the boring machine and are not parallel to the Y axis of the boring machine, the position of the cylinder body relative to the main shaft is adjusted until the planes of the central lines of the inner holes of the two cylinders are perpendicular to the main shaft of the boring machine and are parallel to the Y axis of the boring machine.
4. The cylinder block machining method according to claim 2, wherein the determining of the planes on which the center lines of the inner bores of the two cylinders are located are perpendicular to a main axis of the boring machine and parallel to a Y-axis of the boring machine includes:
determining coordinates of centers of inner hole openings of the two cylinders, wherein the coordinates comprise X-axis coordinates of the boring machine;
and when the difference value of the X-axis coordinates in the coordinates of the centers of the openings of the inner holes of the two cylinders is smaller than the target coordinate difference value, determining that the plane of the center lines of the inner holes of the two cylinders is parallel to the Y axis of the boring machine.
5. The cylinder block machining method according to claim 4, wherein determining coordinates of a center of an inner hole opening of a first cylinder of the two cylinders includes:
installing a dial indicator on a main shaft of the boring machine;
adjusting the position of the main shaft to enable a detection head of the dial indicator to be abutted against the inner peripheral wall of the inner hole of the first cylinder;
rotating the main shaft for at least one circle, and observing the reading of the dial indicator;
and taking the coordinate of the boring machine when the reading change amplitude of the dial indicator is minimum as the coordinate of the center of the inner hole opening of the first cylinder.
6. The cylinder block machining method according to claim 2, wherein the measuring a distance from the first reference surface to a center of an inner hole opening of the first cylinder by a dial gauge includes:
mounting the dial indicator on a main shaft of the boring machine;
adjusting the position of the spindle to enable a detection head of the dial indicator to be in contact with the first reference surface;
when the reading of the dial indicator is 0, recording a Y-axis coordinate Y1 of the boring machine;
adjusting the position of the main shaft to enable a detection head of the dial indicator to be in contact with the lowest point of the inner hole opening of the first cylinder;
when the reading of the dial indicator is 0, recording a Y-axis coordinate Y2 of the boring machine;
measuring the diameter d of the inner hole of the first cylinder;
and calculating the distance L from the first reference surface to the center of the inner hole opening of the first cylinder, wherein the distance L is Y2-Y1+ d/2.
7. The cylinder block machining method according to claim 2, wherein machining the first reference surface includes:
rotating the table by 90 DEG, milling a first reference surface on one side of the first cylinder;
rotating the workbench by 180 degrees, and milling a first reference surface on the other side of the first cylinder;
determining the flatness of first reference surfaces located on two sides of the first cylinder;
and when the planeness of the first reference surfaces positioned at the two sides of the first cylinder is smaller than the target planeness, finishing the processing of the first reference surfaces.
8. The cylinder block machining method according to claim 7, wherein determining a flatness of a first reference surface located on one side of the first cylinder includes:
adjusting the position of the workbench to enable the inner hole openings of the two cylinders to face to a spindle of the boring machine;
installing a dial indicator on the main shaft;
adjusting the position of the main shaft to enable a detection head of the dial indicator to be in contact with a first reference surface located on one side of the first cylinder;
driving a detection head of the dial indicator to linearly move on a first reference surface positioned on one side of the first cylinder along the length direction of the first cylinder, and observing the reading of the dial indicator;
and taking the reading change amplitude of the dial indicator as the flatness of a first reference surface positioned on one side of the first cylinder.
9. The cylinder block machining method according to claim 8, wherein the mounting of the dial indicator on the main shaft includes:
and the dial indicator is adsorbed on the main shaft through the magnetic base.
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| CN111215852A (en) | 2020-06-02 |
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