CN210849786U - Positioning fixture for grinding differential shell casting by robot - Google Patents
Positioning fixture for grinding differential shell casting by robot Download PDFInfo
- Publication number
- CN210849786U CN210849786U CN201921570348.9U CN201921570348U CN210849786U CN 210849786 U CN210849786 U CN 210849786U CN 201921570348 U CN201921570348 U CN 201921570348U CN 210849786 U CN210849786 U CN 210849786U
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- Prior art keywords
- differential shell
- casting
- shell casting
- positioning fixture
- support
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- Expired - Fee Related
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- 238000005266 casting Methods 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
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Abstract
The utility model discloses a positioning fixture for robot grinding differential shell castings, which comprises a support, a top rod, a limiting plate, a supporting rod and an end cover, wherein the limiting plate is provided with a U-shaped part and is vertically arranged and fixed with the support; the supporting rod is inserted into a hollow window of the differential shell casting, the end cover and the ejector rod are respectively limited at the front end and the rear end of the maximum outer diameter part of the differential shell casting, and the U-shaped part is used for limiting the shaft extension part of the differential shell casting, so that the degrees of freedom of the differential shell casting in six directions including up-down, front-back, left-right and three axial rotations are limited, and the positioning is realized; after the differential shell casting is placed into the positioning fixture, the differential shell casting can be supported for a certain distance in the vertical direction. The utility model discloses to the appearance characteristic of poor shell foundry goods, can pinpoint the foundry goods, the manual work of being convenient for simultaneously places the work piece.
Description
Technical Field
The utility model relates to a machining technology field especially relates to a positioning fixture that is used for robot to grind poor shell foundry goods.
Background
The differential shell is an important part in an automobile transmission device and is generally formed by adopting a casting process. After the blank is formed, the burr flash and the sprue stub left in the casting process need to be ground before machining. The work is always carried out manually, and with the increase of labor cost and the reasons of occupational health, safety, environmental protection and the like, the work tends to be replaced by the work of automatic equipment.
The robot grinding casting is an important technical route for automation of casting cleaning, and in the process of grinding a poor-shell casting by the robot, the casting needs to be positioned in advance so that the robot drives a special clamp to clamp the casting for grinding.
The main body of the differential shell casting is a spherical or hemispherical structure with a hollow window inside and two poles with shaft extensions, and burr flash and casting head residues are left on the end surfaces of the two shafts and the circumference of the maximum outer diameter. Due to the characteristics, the poor shell casting is difficult to accurately position, so that the accuracy of a subsequent robot clamp grabbing process and the precision of a final grinding process are influenced; and too complicated location mode must influence the manual convenience and the work efficiency of placing the foundry goods on the positioning fixture again.
At present, no proper positioning mode in the industry can meet two requirements of accurate pre-positioning of a differential shell casting and rapidness and convenience of manual operation.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a positioning fixture that is used for robot to grind poor shell foundry goods to the technical defect who exists among the prior art.
For realizing the utility model discloses a technical scheme that the purpose adopted is:
a positioning fixture for robot grinding differential shell castings comprises a support, a top rod, a limiting plate, a supporting rod and an end cover, wherein the limiting plate is provided with a U-shaped part and is vertically arranged and fixed with the support, the top rod is fixed on the vertical part of the support, is vertical to the vertical part and is parallel to the limiting plate, the supporting rod is fixed on the vertical part of the support, and the end cover is arranged at the front end of the supporting rod; the supporting rod is inserted into a hollow window of the differential shell casting, the end cover and the ejector rod are respectively limited at the front end and the rear end of the maximum outer diameter part of the differential shell casting, and the U-shaped part is used for limiting the shaft extension part of the differential shell casting, so that the degrees of freedom of the differential shell casting in six directions including up-down, front-back, left-right and three axial rotations are limited, and the positioning is realized; after the differential shell casting is placed into the positioning fixture, the differential shell casting can be supported for a certain distance in the vertical direction.
Wherein, the bracing piece is two round bars of arranging side by side.
The end covers are arranged at the outer ends of the two support rods, and the tops of the end covers are provided with convex shapes for limiting.
The utility model discloses to the appearance characteristic of poor shell foundry goods, the neotype positioning fixture who provides can pinpoint the foundry goods, is convenient for the manual work simultaneously and places the work piece.
Drawings
FIG. 1 is a three-dimensional view of the positioning fixture for robot grinding of poor shell castings of the present invention
FIG. 2 is a schematic view of a positioning fixture for robotic grinding of differential shell castings assembled with the differential shell;
FIG. 3 is yet another schematic illustration of a positioning fixture for robotic grinding of differential shell castings in conjunction with differential shell assembly;
FIG. 4 is a schematic view of a differential shell to be processed;
fig. 5 shows a schematic view of the positioning jig on the turntable.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, the utility model discloses a positioning fixture for poor shell foundry goods is ground to robot, include:
The support is a supporting part of the whole clamp, is in an L shape, is used for installing other components, and fixes the whole clamp to a position needing to be installed.
The support rod 4 is two round rods (round steel or steel pipe) arranged side by side, welded or screwed on the side wall of the support, and is sleeved in the hollow window 7 of the differential shell casting to support the edge of the hollow window of the differential shell casting, so that the downward translation of the differential shell casting, the translation in the horizontal plane perpendicular to the direction of the support rod and the rotation in the horizontal plane perpendicular to the horizontal plane and parallel to the plane of the support rod are limited.
The ejector rod is welded or screwed on the side wall of the support, and is over against the maximum outer diameter part 8 of the differential shell casting (the flash of the outer contour of the casting is just avoided in height). The function of the supporting rod is to limit the freedom of the differential shell casting moving backwards on the supporting rod by abutting against the rear part of the maximum outer diameter part of the differential shell casting.
The limiting plate is fixedly welded at the top of the support, and a U-shaped opening is reserved. The function of the device is to utilize the U-shaped opening to clamp the shaft extension part 6 at one end (upper end) of the differential shell casting to limit the degree of freedom of the differential shell casting to rotate in a plane vertical to the support rod.
The end covers are welded at the outer ends of the two support rods, and the tops of the end covers are provided with bulges in a heart shape. The function of the supporting rod is to limit the forward freedom of the differential shell casting on the supporting rod.
After the whole clamp is installed, the differential shell casting is placed, and the degrees of freedom of the differential shell casting in 6 directions including up-down, front-back, left-right and three axial rotations can be limited by combining the gravity of the differential shell casting, so that accurate positioning is realized.
The utility model discloses a diameter of two bracing pieces and horizontal interval's design, make hollow window 7 of poor shell foundry goods embolia behind bracing piece 4, can upwards hold up a segment distance with the hand, this location that can break away from the end cover, the operator of just so being convenient for will be poor shell foundry goods through its hollow window 7 cover on the bracing piece, put into this positioning fixture, and be convenient for the robot fixture takes away the foundry goods from this positioning fixture and takes away the grinding, or put back this positioning fixture after finishing grinding, after the upper end with the bracing piece under the action of gravity, its axle extension portion can not break away from limiting plate 3 spacing yet.
The working process is as follows:
the positioning fixture can be mounted on a loading and unloading device (such as a rotary table or a shuttle table) of the robot grinding differential shell unit. Take the revolving stage as an example, at the last unloading side of revolving stage 9, set up a plurality of the utility model discloses a fixture, as shown in fig. 5, set up to 8, every side sets up 4, fixture and revolving stage welded fastening. An operator holds the differential shell casting by hand, a hollow window 7 of the differential shell casting is sleeved on a support rod 4 of the positioning clamp, a shaft extension part 6 at one end is clamped into a U-shaped opening of a limiting plate at the top of the positioning clamp, and the maximum outer diameter part of the casting is positioned between the ejector rod and the end cover, so that the differential shell casting can be positioned. Then the positioning fixture and the casting are rotated to the robot side by the turntable, the casting is taken down from the positioning fixture by the robot fixture and is ground; and after grinding is finished, placing the casting into a positioning fixture, finally rotating the positioning fixture and the casting to the feeding and discharging sides by a rotary table, taking down the finished casting by an operator, and placing the next batch of poor shell castings to be ground.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (3)
1. A positioning fixture for robot grinding of differential shell castings is characterized by comprising a support, an ejector rod, a limiting plate, a supporting rod and an end cover, wherein the limiting plate is provided with a U-shaped portion and is vertically arranged and fixed with the support; the supporting rod is inserted into a hollow window of the differential shell casting, the end cover and the ejector rod are respectively limited at the front end and the rear end of the maximum outer diameter part of the differential shell casting, and the U-shaped part is used for limiting the shaft extension part of the differential shell casting, so that the degrees of freedom of the differential shell casting in six directions including up-down, front-back, left-right and three axial rotations are limited, and the positioning is realized; after the differential shell casting is placed into the positioning fixture, the differential shell casting can be supported for a certain distance in the vertical direction.
2. The positioning fixture for robotic grinding of differential shell castings according to claim 1, wherein the support rods are two round rods arranged side by side.
3. The positioning fixture for robotic grinding of differential shell castings according to claim 1, wherein the end caps are mounted at the outer ends of the two support rods with a convex shape at the top for limiting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921570348.9U CN210849786U (en) | 2019-09-19 | 2019-09-19 | Positioning fixture for grinding differential shell casting by robot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921570348.9U CN210849786U (en) | 2019-09-19 | 2019-09-19 | Positioning fixture for grinding differential shell casting by robot |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210849786U true CN210849786U (en) | 2020-06-26 |
Family
ID=71303062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921570348.9U Expired - Fee Related CN210849786U (en) | 2019-09-19 | 2019-09-19 | Positioning fixture for grinding differential shell casting by robot |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210849786U (en) |
-
2019
- 2019-09-19 CN CN201921570348.9U patent/CN210849786U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200626 |