CN214109643U - Finish machining tool for hemispherical surface in inclined end face - Google Patents
Finish machining tool for hemispherical surface in inclined end face Download PDFInfo
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- CN214109643U CN214109643U CN202023057588.4U CN202023057588U CN214109643U CN 214109643 U CN214109643 U CN 214109643U CN 202023057588 U CN202023057588 U CN 202023057588U CN 214109643 U CN214109643 U CN 214109643U
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Abstract
The patent discloses a fine machining tool for a hemispherical surface in an inclined end surface, which comprises a cylindrical clamp body (1) and an elastic positioning block (2), wherein a positioning inclined surface (102) is arranged on the front end surface of the clamp body (1), and a positioning hole (101) and a positioning pin (4) are arranged on the positioning inclined surface (102); the elastic positioning block (2) is fixed on the positioning hole (101) through a conical surface compression screw (3); the inner circumference of a cylindrical cavity (502) at the lower end of the workpiece to be machined (5) is clamped on the outer circumference of the elastic cylinder (202), the lower end face of the cylindrical cavity is attached to the positioning inclined plane (102), and the conical surface pressing screw (3) is screwed down to expand the diameter of the elastic cylinder (202) of the elastic positioning block (2) and then tightly fix the workpiece to be machined (5) on the elastic positioning block (2); the advantage of this patent is: the spherical surface machining size precision is high; the axis of the cylindrical cavity at the lower part of the spherical surface passes through the spherical center of the hemispherical surface, and the spherical center is arranged on the inclined end surface.
Description
Technical Field
The patent relates to the technical field of machining, especially a hemisphere face finish machining frock in inclined end face.
Background
At present, a forming cutter is generally adopted for machining spherical surfaces on milling equipment such as a milling machine, a machining center, a four-axis machine tool and the like, the machining precision is low, the surface roughness is poor, the spherical surface profile is difficult to guarantee, and the spherical surface machining on some special-shaped parts can not even be finished. The ball pump is a new mechanical structure in recent years, and is currently in the industrial development stage, and a plurality of processing methods and processing technologies are under development.
As shown in fig. 1, the cylinder body is a cylinder structure, the upper end surface of the cylinder is an inclined end surface, an included angle α is formed between the upper end surface and the vertical end surface of the cylinder, a hemispherical surface 501 is arranged on the upper end surface, the upper end surface passes through the spherical center of the hemispherical surface 501, the lower end surface of the cylinder is a vertical end surface, that is, the lower end surface is vertical to the axis of the cylinder, a cylinder inner cavity 502 is arranged at the center of the lower end surface of the cylinder, and the axis of the cylinder inner cavity 502 passes through the spherical center of the hemispherical surface 501; in the manufacturing process of a prototype, a four-axis machining center or other milling methods are adopted, and the problems in the machining process are as follows: firstly, the dimensional accuracy and the surface roughness of the hemispherical surface 501 can not meet the requirements of a drawing (the requirements of the drawing are that the dimensional accuracy is +/-0.01 mm, the spherical profile is 0.01 mm, and the roughness is Ra0.8 microns); secondly, the center of the hemisphere 501 cannot be guaranteed to be on the end surface; third, the axis of the lower end surface cylindrical cavity 502 does not pass through the center of the hemisphere 501; fourthly, the consistency of the product is poor, and the processing efficiency is low. The problems cannot be overcome through multiple processing trial production.
For spherical surface machining, if lathe machining is adopted, the dimensional accuracy and the machining efficiency can be improved, and the surface roughness can be reduced, but the end surface of the hemispherical surface 501 is an inclined surface, so that direct machining cannot be realized; the angle of the inclined end face is changed by adopting a common tool, so that the inclined end face is perpendicular to the rotation center of a lathe, the clamping is inconvenient, the clamping precision is poor, the spherical center of the hemispherical face 501 is not positioned on the end face, the axis of the cylindrical inner cavity 502 on the lower end face cannot pass through the spherical center of the hemispherical face 501, parts meeting the drawing requirements cannot be obtained all the time, and the performance of the spherical pump is seriously influenced.
Disclosure of Invention
The purpose of this patent is exactly to design a hemisphere face finish machining frock in the inclined end face, accomplishes the sphere processing on the high accuracy lathe.
The technical scheme of this patent is: the utility model provides a hemisphere face finish machining frock in inclined end face, characterized by: the clamp comprises a cylindrical clamp body and an elastic positioning block, wherein a positioning inclined plane is arranged on the front end face of the clamp body, and a positioning hole and a positioning pin, the axis of which is vertical to the positioning inclined plane, are arranged on the positioning inclined plane; the included angle between the positioning inclined plane and the front vertical end surface of the fixture body is equal to the included angle between the vertical end surface and the inclined end surface of the cylinder to be machined; the positioning cylinder at the lower end of the elastic positioning block is inserted into the positioning hole, the elastic cylinder with the upper end coaxial with the positioning cylinder protrudes out of the positioning inclined plane, the end part of the elastic cylinder is provided with a conical surface counter bore, and the elastic positioning block is fixed on the positioning hole through a conical surface compression screw; the circumference in the cylindrical cavity at the lower end of the workpiece to be machined is clamped on the outer circumference of the elastic cylinder of the elastic positioning block, the lower end face of the elastic positioning block is attached to the positioning inclined plane, and the positioning pin is inserted into the pin hole at the lower end face of the workpiece to be machined.
A positioning threaded hole coaxial with the positioning hole is formed in the center of the bottom of the positioning hole, the head of the conical surface compression screw is a conical surface, the shape of the conical surface is matched with that of a conical surface counter bore of the elastic positioning block, and external threads at the lower end of the conical surface compression screw are matched with internal threads of the positioning threaded hole to form threaded connection; an inner hexagonal groove is formed in the end face of the head of the conical surface compression screw;
the vertical surface part of the front end surface of the fixture body is a tool setting reference surface;
the pin hole on the lower end face of the workpiece to be machined is the existing pin hole on the part, and the position of the positioning pin hole on the positioning inclined plane of the clamp body is matched with the position of the pin hole on the workpiece to be machined.
The advantage of this patent is: 1) the precision of the machined spherical surface is high, and the roughness of the spherical surface is low; particularly, the axis of the cylindrical cavity at the lower part of the spherical surface can accurately pass through the spherical center of the hemispherical surface, and the spherical center can be ensured to be on the inclined end surface; 2) the clamping is convenient, the consistency of the product is good, and mass production can be realized; 3) the processing cost is low.
Drawings
FIG. 1: a schematic structural diagram of a part to be processed;
FIG. 2: the structure schematic diagram of the elastic positioning block;
FIG. 3: a schematic view of the installation of a workpiece to be machined on a tool;
FIG. 4: schematic structural diagram of clamp body
FIG. 5: an explosion diagram of a tool structure;
in the figure: 1-a clamp body; 101-a positioning hole; 102-positioning the inclined plane; 103-positioning pin holes; 104-positioning threaded holes; 105-tool-setting reference surface; 2-elastic positioning blocks; 201-positioning cylinder; 202-an elastic cylinder; 203-conical surface counter bore; 3-conical surface compression screw; 4-positioning pins; 5-processing the workpiece; 501-hemispherical surface; 502-cylindrical lumen; 503-pinhole.
Detailed Description
The following detailed description of the present patent refers to the accompanying drawings and detailed description.
As shown in fig. 1, the workpiece 5 to be processed is a cylinder part of a spherical pump, and has a cylindrical structure, wherein the upper end surface of the cylindrical structure is an inclined end surface, and the lower end surface of the cylindrical structure is a vertical end surface perpendicular to a straight line of the cylindrical structure; a hemispherical surface 501 is arranged on the upper end surface, the whole spherical surface is divided into two by the inclined end surface, the hemispherical surface 501 is one half of the whole spherical surface, and the spherical center of the hemispherical surface 501 is arranged on the upper end surface; the lower end surface is provided with a cylinder inner cavity 502 coaxial with the cylinder of the cylinder body; as a rotational support for the main shaft of the spherical pump rotor, the axis of the cylindrical cavity 502 must pass through the spherical center of the hemisphere. The lower end of the spherical pump cylinder body is provided with a pin hole 503 which is positioned with the main shaft bracket or the cylinder cover.
As shown in fig. 3 to 5, the tool for finish machining of a hemispherical surface in an inclined end surface comprises a clamp body 1 and an elastic positioning block 2, wherein the clamp body 1 is a cylinder, the front end surface of the clamp body 1 is a vertical end surface perpendicular to the cylindrical axis of the clamp body 1, a positioning inclined surface 102 is arranged on the front end surface of the cylinder, and a positioning hole 101 and a positioning pin hole 103 are arranged on the positioning inclined surface 102; an included angle alpha between the positioning inclined plane 102 and the vertical end surface of the fixture body 1 is equal to an included angle alpha between the vertical end surface and the inclined end surface of the cylinder of the workpiece 5 to be machined; the positioning hole 101 is a cylindrical hole, the axis of the positioning hole 101 is perpendicular to the positioning inclined plane 102, and a positioning threaded hole 104 coaxial with the positioning hole 101 is arranged in the center of the bottom of the positioning hole 101. The position of the positioning pin hole 103 is determined to be matched with the pin hole 503 on the workpiece 5 to be processed, one end of the positioning pin 4 is inserted into the positioning pin hole 103, and the other end of the positioning pin protrudes out of the surface of the positioning inclined surface 102 vertically.
As shown in fig. 2, the upper end of the elastic positioning block 2 is an elastic cylinder 202, the lower end of the elastic positioning block is a positioning cylinder 201 coaxial with the elastic cylinder 202, the diameter of the positioning cylinder 201 is adapted to the diameter of the positioning hole 101, the positioning cylinder 201 at the lower end of the elastic positioning block 2 is placed in the positioning hole 101, the depth of the positioning cylinder 201 is slightly smaller than the depth of the positioning hole 101, the diameter of the elastic cylinder 202 is slightly smaller than the diameter of a cylindrical cavity 502 at the lower end of the workpiece 5 to be machined, the axial length of the elastic cylinder 202 is smaller than the depth of the cylindrical cavity 502 at the lower end of the workpiece 5 to be machined, a conical surface counterbore 203 is arranged in the center of the elastic cylinder 202, and the bottom of the cone is a through hole axially penetrating through the positioning cylinder 201; a plurality of elastic tensioning grooves are uniformly distributed on the circumference of the elastic cylinder 202, and when the conical surface of the conical surface counter bore 203 is extruded outwards, the diameter of the cylinder of the elastic cylinder 202 is elastically expanded; the removal of the compressive force on the inner conical surface causes the cylindrical diameter of the resilient cylinder 202 to rebound and return to its original value.
The elastic positioning block 2 is inserted into the positioning hole 101 through a positioning cylinder 201 at the lower end of the elastic positioning block, an elastic cylinder 202 at the upper end of the elastic positioning block, which is coaxial with the positioning cylinder 201, protrudes out of the positioning inclined plane 102, and the elastic positioning block 2 is fixed in the positioning hole 101 through a conical surface compression screw 3; the head of the conical surface compression screw 3 is a conical surface, the shape of the conical surface is adapted to the conical surface of the conical surface counter bore 203 of the elastic positioning block 2, and the external thread at the lower end of the conical surface compression screw 3 is adapted to the internal thread of the positioning threaded hole 104 to form threaded connection; an inner hexagonal groove is arranged on the end surface of the head part of the conical surface compression screw 3; the conical surface of the conical surface compression screw 3 is pressed on the conical surface of the conical surface counter bore 203, and the diameter of the elastic cylinder is elastically changed by rotating the tightness of the conical surface compression screw 3 by an internal hexagonal wrench; the inner circumference of a cylindrical cavity 502 at the lower end of the workpiece 5 to be machined is clamped on the outer circumference of an elastic cylinder 202 of the elastic positioning block 2, the lower end face of the elastic cavity is attached to the positioning inclined plane 102, a positioning pin 4 on the positioning inclined plane 102 is inserted into a pin hole 503 on the lower end face of the workpiece 5 to be machined, and the conical surface pressing screw 3 is screwed down to expand the diameter of the elastic cylinder 202 of the elastic positioning block 2 and then tightly fix the workpiece 5 to be machined on the elastic positioning block 2; the rear end cylinder of the fixture body 1 is clamped on a lathe spindle chuck, the inclined end surface of the upper end of the workpiece 5 to be machined is perpendicular to the axis of the fixture body 2, and tool setting can be directly conducted. The vertical end face part of the front end face of the fixture body 1 can be used as a tool setting reference surface 105 in turning, so that accurate feeding can be realized, and the position of the spherical center on the front end inclined end face of the workpiece 5 to be machined is ensured.
Claims (4)
1. The utility model provides a hemisphere face finish machining frock in inclined end face, characterized by: the clamp comprises a cylindrical clamp body (1) and an elastic positioning block (2), wherein a positioning inclined plane (102) is arranged on the front end face of the clamp body (1), and a positioning hole (101) and a positioning pin (4) of which the axis is vertical to the positioning inclined plane (102) are arranged on the positioning inclined plane (102); the included angle between the positioning inclined plane (102) and the front vertical end surface of the fixture body (1) is equal to the included angle between the vertical end surface and the inclined end surface of the workpiece to be machined (5); a positioning cylinder (201) at the lower end of the elastic positioning block (2) is inserted into the positioning hole (101), an elastic cylinder (202) with the upper end coaxial with the positioning cylinder (201) protrudes out of the positioning inclined plane (102), a conical surface counter bore (203) is formed in the end part of the elastic cylinder (202), and the elastic positioning block (2) is fixed on the positioning hole (101) through a conical surface compression screw (3); the inner circumference of a cylindrical cavity (502) at the lower end of the workpiece to be machined (5) is clamped on the outer circumference of the elastic cylinder (202), the lower end face is attached to the positioning inclined plane (102), and the positioning pin (4) is inserted into a pin hole (503) of the lower end face of the workpiece to be machined (5).
2. The tool for finish machining of the hemispherical surface in the inclined end face as claimed in claim 1, wherein the tool is characterized in that: a positioning threaded hole (104) coaxial with the positioning hole (101) is formed in the center of the bottom of the positioning hole (101), the head of the conical surface compression screw (3) is a conical surface, the shape of the conical surface is matched with that of a conical surface counter bore of the elastic positioning block (2), and external threads at the lower end of the conical surface compression screw (3) are matched with internal threads of the positioning threaded hole (104) to form threaded connection; an inner hexagonal groove is arranged on the end face of the head of the conical surface compression screw (3).
3. The tool for finish machining of the hemispherical surface in the inclined end face as claimed in claim 1, wherein the tool is characterized in that: the vertical surface part of the front end surface of the fixture body (1) is a tool setting reference surface (105).
4. The tool for finish machining of the hemispherical surface in the inclined end face as claimed in claim 1, wherein the tool is characterized in that: the pin hole (503) on the lower end surface of the workpiece to be machined (5) is selected from the existing pin hole on the part, and the position of the positioning pin hole (103) on the positioning inclined surface (102) of the fixture body (1) is matched with the position of the pin hole (503) on the workpiece to be machined (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023057588.4U CN214109643U (en) | 2020-12-17 | 2020-12-17 | Finish machining tool for hemispherical surface in inclined end face |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023057588.4U CN214109643U (en) | 2020-12-17 | 2020-12-17 | Finish machining tool for hemispherical surface in inclined end face |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214109643U true CN214109643U (en) | 2021-09-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023057588.4U Active CN214109643U (en) | 2020-12-17 | 2020-12-17 | Finish machining tool for hemispherical surface in inclined end face |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214109643U (en) |
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2020
- 2020-12-17 CN CN202023057588.4U patent/CN214109643U/en active Active
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Effective date of registration: 20230814 Address after: A706, Block A, TCL Building, No. 6 Gaoxinyuan 1st Road, Yuehai Street, Nanshan District, Shenzhen City, Guangdong Province, 518000 Patentee after: Shenzhen Spherical Power Technology Co.,Ltd. Address before: 518000 Room 201, building A, No. 1, Qian Wan Road, Qianhai Shenzhen Hong Kong cooperation zone, Shenzhen, Guangdong (Shenzhen Qianhai business secretary Co., Ltd.) Patentee before: Shenzhen Zhong'an Power Technology Co.,Ltd. |