CN212385067U - High-precision sector angle milling clamping fixture - Google Patents

High-precision sector angle milling clamping fixture Download PDF

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Publication number
CN212385067U
CN212385067U CN202021993315.8U CN202021993315U CN212385067U CN 212385067 U CN212385067 U CN 212385067U CN 202021993315 U CN202021993315 U CN 202021993315U CN 212385067 U CN212385067 U CN 212385067U
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China
Prior art keywords
milling
positioning
rotating arm
fixed
clamping fixture
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Active
Application number
CN202021993315.8U
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Chinese (zh)
Inventor
赵金刚
王宏超
赵延君
赵雪壑
王培贺
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Dalian Marine Diesel Co ltd
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Dalian Marine Diesel Co ltd
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Priority to CN202021993315.8U priority Critical patent/CN212385067U/en
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Publication of CN212385067U publication Critical patent/CN212385067U/en
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Abstract

A high-precision sector angle milling clamping fixture comprises a rotating arm and a milling clamping fixture body, wherein the rotating arm is in butt joint with the milling clamping fixture body to form a sector thrust block milling clamping fixture integrally. The rocking arm positioning seat passes through the rocking arm locating pin to be fixed in rocking arm apex department, and the rocking arm is close to milling mould main part department and is provided with two first fixed orificess, mills the position that the mould main part contacted with the rocking arm and is provided with two second fixed orificess, and the fixed pin inserts first fixed orificess, second fixed orifices in proper order. A baffle is arranged at the position, close to the rotating arm, of the milling mould body, a positioning screw is arranged on the baffle, a round carcass positioning sleeve is fixed in a round groove in the center of the milling mould body, a round carcass positioning pin is embedded in the carcass positioning sleeve, a bolt is inserted into the carcass positioning pin, and a positioning arc is fixed at one end, far away from the rotating arm, of the milling mould body. The thrust block milling clamping fixture greatly simplifies the alignment difficulty in processing, realizes the batch processing of products, reduces the production of finished products and improves the processing efficiency.

Description

High-precision sector angle milling clamping fixture
Technical Field
The invention relates to the field of machining tools for sector thrust blocks of marine diesel engines, in particular to a high-precision sector angle milling mold.
Background
The section of the thrust block of the low-speed marine diesel engine is in a fan ring shape, the size of a central angle corresponding to two fan surfaces and the geometric tolerance of the surfaces are strict, and the accuracy of the size of an included angle between the two processed fan surfaces and the centering property of the processed fan surfaces are difficult to guarantee because the section of a workpiece is the fan ring and the position of the circular center corresponding to a circular arc is a virtual point. The thrust block does not have a proper positioning reference in the machining process, and a numerical control machine tool with high precision is required to be machined during machining, but a large amount of time is wasted by determining the machining reference before machining, and the quality cannot be guaranteed after machining. Because the number of the thrust blocks of each low-speed diesel engine is large, according to the production and processing method, each piece needs to be independently aligned and then processed, and the method is not suitable for batch production, so the cost in the production process is high and the processing efficiency is low.
Disclosure of Invention
In order to solve the problems, the invention provides a high-precision sector angle milling clamping fixture, aiming at achieving the purposes of conveniently and quickly determining a positioning reference and ensuring the processing quality, and the adopted technical scheme is as follows:
the high-precision sector angle milling fixture comprises a triangular rotating arm and a milling fixture body, wherein the rotating arm is in butt joint with the milling fixture body to form a sector thrust block milling fixture integrally.
The rocking arm is kept away from the one end of milling the mould main part, fixes the rocking arm positioning seat through the rocking arm locating pin rocking arm apex department, the rocking arm is close to mill mould main part department and is provided with two first fixed orificess, mill the mould main part with the position that the rocking arm contacted is provided with two second fixed orificess, first fixed orificess with second fixed orificess position is corresponding, and the fixed pin inserts in proper order first fixed orificess in the second fixed orificess.
The milling mould comprises a milling mould body and is characterized in that a baffle is arranged at the position, close to a rotating arm, of the milling mould body, a positioning screw is arranged on the baffle, a round carcass positioning sleeve is fixed in a round groove in the center of the milling mould body, a round carcass positioning pin is embedded in the carcass positioning sleeve, a bolt is inserted into the carcass positioning pin, and a positioning arc is fixed at one end, far away from the rotating arm, of the milling mould body.
Above-mentioned fan-shaped angle of high accuracy mills mould, further, the location circular arc is the arc, the location circular arc is fixed mill mould main part arc edge, the arc radius of location circular arc with it is the same to mill mould main part arc radius.
In the high-precision sector angle milling clamping fixture, furthermore, the positioning screw penetrates through the baffle plate and is perpendicular to the baffle plate, and the positioning screw is in contact with the thrust block.
In the high-precision sector angle milling clamping fixture, the baffle is further fixed on the milling clamping fixture body through screws.
In the high-precision sector angle milling clamping fixture, the rotating arm is further connected with the milling clamping fixture body through a screw.
The thrust block to be processed is placed in the thrust block milling mould, the fan-shaped angle surface of the thrust block is completely aligned with the angle surface of the milling mould, the thrust block is clamped through the matching of the positioning screw and the positioning arc, the complete positioning of the thrust block can be realized, and the requirement of form and position tolerance after the fan-shaped angle surface of the thrust block is processed can be met.
The milling clamping fixture for the fan-shaped thrust block is simple in structure and low in cost, the clamping fixture can be machined by a common milling machine, batch machining can be carried out by only once clamping and aligning the clamping fixture before machining, and the requirements of the angle and form and position tolerance of the fan-shaped angle surface of the thrust block can be completely met.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is the thrust block milling fixture after assembly;
FIG. 3 is a schematic view of a thrust block defined on a milling fixture;
FIG. 4 is a schematic representation of the use of the present invention;
the device comprises a base, a clamping device and a clamping device, wherein the clamping device comprises a rotating arm positioning seat 1, a rotating arm positioning pin 2, a rotating arm 3, a screw 4, a positioning screw 5, a milling clamping fixture main body 6, a baffle 7, a positioning circular arc 8, a tire body positioning sleeve 9, a bolt 10, a tire body positioning pin 11 and a fixing pin 12.
Detailed Description
The invention is further explained by combining the attached drawings, and the high-precision sector angle milling clamping fixture shown in figures 1 and 2 is provided with a rotating arm 3 and a milling clamping fixture body 6, wherein the rotating arm and the milling clamping fixture body are butted through a screw 4 to form a thrust block milling clamping fixture which is sector as a whole. The tumbler is kept away from the one end of milling mould main part, is fixed with tumbler positioning seat 1 through tumbler locating pin 2, is connected tumbler and tumbler positioning seat through tumbler locating pin, fixes tumbler positioning seat again, realizes milling the mould wholly can revolute the tumbler locating pin and carry out 360 rotations.
A circular groove is formed in the center of the milling clamping fixture main body, a tire body positioning sleeve 9 is fixed in the groove, a tire body positioning pin 11 is embedded in the tire body positioning sleeve, a bolt 10 is inserted into the tire body positioning pin, and the thrust block milling clamping fixture is fixed in a T-shaped groove of a working table top. Through bolt and matrix locating pin, mill the mould with the thrust piece and fix on the workstation, and then determine the required first station of processing and second station.
A baffle 7 is fixed on the milling mould body and at the joint of the milling mould body and the rotating arm through bolts, the baffle is provided with two positioning screws 5, the positioning screws are perpendicular to the baffle, and the positioning screws are in contact with the thrust block. And a positioning arc 8 is fixed at the edge of the milling clamping fixture main body, and the radius of the positioning arc is the same as the arc radius of the milling clamping fixture main body. The baffle is matched with the positioning arc, the thrust block is fixed on the milling mould main body, and the thrust block is processed. The position that rocking arm and milling mould main part dock mutually is provided with two first fixed orificess, and the position that corresponds with first fixed orifices on milling mould main part is provided with the second fixed orifices, and the bolt passes first fixed orifices, second fixed orifices in proper order, and first fixed orifices, second fixed orifices are passed in proper order to fixed pin 12.
As shown in fig. 3 and 4, the specific use method of the pad milling fixture is as follows:
a. before processing, firstly assembling a milling mould, placing the thrust block milling mould on a machine tool workbench, aligning one edge of a sector surface of the thrust block milling mould to enable the straightness to be less than 0.02mm, installing a tyre body positioning sleeve and a tyre body positioning pin in the milling mould, fixing the tyre body positioning sleeve and the tyre body positioning pin in a T-shaped groove of a workbench surface by bolts, rotating the milling mould around the tyre body positioning pin at the moment, placing the thrust block in the milling mould, and fixing the thrust block in a positioning arc through a baffle plate to ensure that a workpiece is aligned with two fan-shaped side surfaces of the milling mould.
b. During machining, the milling clamping fixture is rotated, so that one fan-shaped side surface of the milling clamping fixture body is parallel to the X axis of the machine tool, and the parallelism is less than 0.02 mm. At this time, a rotating arm positioning pin and a rotating arm positioning seat are arranged on the rotating arm, the rotating arm positioning seat is fixed on a machine tool workbench by a pressing plate and is tightly tightened to determine a first station
c. And after the first station is processed, taking out the rotating arm positioning pin on the rotating arm, rotating the milling mold body to enable the other fan-shaped side surface of the thrust block to be parallel to the X axis of the machine tool, wherein the parallelism is less than 0.02mm, installing the rotating arm positioning pin on the rotating arm, inserting the rotating arm positioning pin into the other rotating arm positioning seat, fixing the rotating arm positioning seat on the working table of the machine tool again by using a pressing plate and tightening the rotating arm positioning seat, and determining a second station.
The two sector finished products of the thrust block can be conveniently machined under the two stations, alignment operation is not needed after the workpiece is replaced, and the thrust block can be directly machined after the station is replaced.
The method greatly simplifies the alignment difficulty in processing, realizes the batch processing of products, reduces the production of finished products and improves the processing efficiency.

Claims (5)

1. High accuracy fan-shaped angle mills mould, its characterized in that: the milling fixture is provided with a triangular rotating arm (3) and a milling fixture body (6), wherein the rotating arm is butted with the milling fixture body to form a thrust block milling fixture which is integrally fan-shaped;
fixing a rotating arm positioning seat (1) at the vertex of the rotating arm through a rotating arm positioning pin (2) at one end of the rotating arm, which is far away from the milling mould body, wherein two first fixing holes are formed at the position, which is close to the milling mould body, of the rotating arm, two second fixing holes are formed at the position, which is in contact with the rotating arm, of the milling mould body, the first fixing holes correspond to the second fixing holes in position, and fixing pins (12) are sequentially inserted into the first fixing holes and the second fixing holes;
the milling fixture comprises a milling fixture body, wherein a baffle (7) is arranged at a position, close to a rotating arm, of the milling fixture body, a positioning screw (5) is arranged on the baffle, a round carcass positioning sleeve (9) is fixed in a round groove in the center of the milling fixture body, a round carcass positioning pin (11) is embedded in the carcass positioning sleeve, a bolt (10) is inserted into the carcass positioning pin, and a positioning circular arc (8) is fixed at one end, far away from the rotating arm, of the milling fixture body.
2. The high precision scalloped angle milling fixture of claim 1, wherein: the positioning circular arc is arc-shaped, the positioning circular arc is fixed at the arc-shaped edge of the milling clamping fixture main body, and the arc radius of the positioning circular arc is the same as that of the milling clamping fixture main body.
3. The high precision scalloped angle milling fixture of claim 1, wherein: the positioning screw penetrates through the baffle plate and is perpendicular to the baffle plate, and the positioning screw is in contact with the thrust block.
4. The high precision scalloped angle milling fixture of claim 1, wherein: the baffle is fixed on the milling clamping fixture body through a screw (4).
5. The high precision scalloped angle milling fixture of claim 1, wherein: the rotating arm is connected with the milling clamping fixture body through a screw.
CN202021993315.8U 2020-09-14 2020-09-14 High-precision sector angle milling clamping fixture Active CN212385067U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202021993315.8U CN212385067U (en) 2020-09-14 2020-09-14 High-precision sector angle milling clamping fixture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202021993315.8U CN212385067U (en) 2020-09-14 2020-09-14 High-precision sector angle milling clamping fixture

Publications (1)

Publication Number Publication Date
CN212385067U true CN212385067U (en) 2021-01-22

Family

ID=74252841

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202021993315.8U Active CN212385067U (en) 2020-09-14 2020-09-14 High-precision sector angle milling clamping fixture

Country Status (1)

Country Link
CN (1) CN212385067U (en)

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