CN107825164B - Overturning positioning fixture - Google Patents
Overturning positioning fixture Download PDFInfo
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- CN107825164B CN107825164B CN201711117892.3A CN201711117892A CN107825164B CN 107825164 B CN107825164 B CN 107825164B CN 201711117892 A CN201711117892 A CN 201711117892A CN 107825164 B CN107825164 B CN 107825164B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/04—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part adjustable in inclination
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jigs For Machine Tools (AREA)
Abstract
The utility model aims to provide a turnover positioning clamp which is used for realizing the pre-positioning of a workpiece on the premise of not influencing the normal processing of the workpiece. The turnover positioning fixture comprises a base and a turnover base which is rotationally arranged on the base around a horizontal axis, wherein a placing position for placing a workpiece is arranged on the turnover base, a pressing mechanism for pressing the workpiece is further arranged on the turnover base, an end positioning piece is detachably or telescopically assembled on the turnover base beside the placing position, and the end positioning piece is provided with a blocking position for being matched with a surface to be processed of the workpiece so as to prepare the pressing mechanism to press the workpiece, and a moving position moved away from the surface to be processed of the workpiece is further provided. The workpiece is pre-positioned on the premise that normal work of the workpiece is not affected.
Description
Technical Field
The utility model relates to a turnover positioning clamp.
Background
In the prior art, milling or drilling is sometimes required on multiple surfaces of a workpiece, and at this time, the corresponding surfaces of the workpiece need to be arranged upwards to facilitate processing, which requires multiple times of turning the workpiece to complete processing of the workpiece.
One patent of the utility model with the publication number of CN206493139U discloses a turnover fixture, which comprises a base and a turnover base horizontally assembled on the base in a rotating way, wherein a pressing mechanism for pressing a workpiece is arranged on the turnover base and comprises a plurality of clamping parts, each clamping part comprises a hydraulic cylinder fixed on the turnover base, a pressing head is fixed at the top end of a push rod of each hydraulic cylinder, and the hydraulic cylinders can drive the pressing heads to move up and down and rotate around the axis of the push rod so as to press the workpiece on the turnover base through up and down movement and rotation.
However, in the above-mentioned turning fixture, when the workpiece is initially clamped, that is, when the workpiece is placed on the turning base but the pressing mechanism does not press, the workpiece is in an undeposited state, and at this time, the workpiece is easy to play, so that the pressing mechanism does not position and press the workpiece at a set position. Meanwhile, as a plurality of surfaces of the workpiece are required to be machined, the corresponding surfaces of the external cutter cannot be affected when the workpiece is pressed.
Disclosure of Invention
The utility model aims to provide a turnover positioning clamp which is used for realizing the pre-positioning of a workpiece on the premise of not influencing the normal processing of the workpiece.
In order to achieve the above purpose, the technical scheme of the overturning and positioning fixture provided by the utility model is as follows: the utility model provides a upset positioning fixture, includes the base and around the upset base on the base is located in the horizontal axis rotation, is equipped with the position of placing that is used for placing the work piece on the upset base, still is equipped with the hold-down mechanism who is used for compressing tightly the work piece on the upset base, and the side of placing the position on the upset base is detachably or telescopic is equipped with the tip setting element, the tip setting element has and is used for waiting to process the face of work piece to keep off the cooperation in reserve hold-down mechanism compresses tightly the fender position of work piece, still has the position of moving away that is moved away by the face department of waiting to process of work piece.
The beneficial effects of the utility model are as follows: the turnover positioning fixture comprises a base and a turnover base arranged on the base, wherein the rotation axis of the turnover base is a horizontal axis, a placing position and a pressing mechanism for pressing a workpiece on the placing position are arranged on the turnover base, and an end positioning piece is detachably or telescopically arranged at the side of the placing position. When the turnover base is used, a workpiece is placed on the placement position of the turnover base, the end positioning piece is placed on the blocking position, the end positioning piece is in blocking fit with the surface to be processed of the workpiece, and the workpiece is pre-positioned to prevent the workpiece from moving. After the pressing mechanism presses the workpiece, the end positioning piece is placed on the moving-away position, the end positioning piece is moved away from the workpiece, the stop of the workpiece on the surface to be processed is released, the external processing tool is not influenced to process the surface to be processed of the workpiece, and the end positioning piece is prevented from interfering the processing tool. Finally, the workpiece is pre-positioned on the premise of not influencing the normal work of the workpiece.
Further, the end positioning piece is an end surface positioning column which is telescopically assembled on the overturning base.
Further, the overturning positioning fixture comprises a hydraulic driving mechanism for driving the end face positioning column to stretch out and draw back, and the hydraulic driving mechanism comprises a hydraulic cylinder with an output end provided with the end face positioning column.
Further, the pressing mechanism comprises two side pressing blocks which can move relatively along the left-right direction to clamp the workpiece in a positioning mode, and the end face positioning piece is arranged on one side of the placing position along the front-rear direction.
Further, the two side compressing blocks comprise fixed compressing blocks fixedly arranged on the overturning base and movable compressing blocks assembled on the overturning base in a guiding and moving mode, and guiding blocks matched with the movable compressing blocks in a guiding and moving mode in the left-right direction are fixedly arranged on the overturning base.
Further, an L-shaped step for positioning and clamping in a workpiece is arranged on the end face of one end, facing the movable compression block, of the fixed compression block.
Further, the number of the movable compression blocks is two and is respectively arranged at the left side and the right side of the fixed compression block, and the number of the placement positions is correspondingly two and is arranged between the corresponding movable compression blocks and the fixed compression blocks.
Further, a movable pressing plate is arranged on the fixed pressing block in a guiding and moving manner along the up-down direction, and the movable pressing plate is provided with a pressing part capable of pressing the workpieces on the two placing positions downwards at the same time.
Further, the pressing mechanism further comprises a movable pressing plate which is arranged above the placing position and is assembled on the overturning base in a telescopic way along the up-down direction, and a yielding channel which is used for a processing tool to pass through so as to process a workpiece below the movable pressing plate is arranged on the movable pressing plate.
Further, a through hole penetrating through the turnover base for processing the workpiece after the processing tool passes through is formed in the placement position of the turnover base.
Drawings
FIG. 1 is a schematic diagram of a turnover positioning fixture according to the present utility model;
FIG. 2 is a schematic diagram illustrating the assembly of the end face positioning column and the third hydraulic cylinder in FIG. 1;
FIG. 3 is a schematic view of an assembly of the movable compression block, guide block and first hydraulic cylinder of FIG. 1;
FIG. 4 is a partial cross-sectional view of a flip positioning fixture provided by the present utility model;
FIG. 5 is a schematic diagram of the overturning locating fixture provided by the utility model during oil feeding;
FIG. 6 is a schematic diagram of the overturn positioning fixture according to the present utility model during oil drainage;
FIG. 7 is a schematic view of a workpiece;
FIG. 8 is a schematic illustration of a workpiece removal prediction;
FIG. 9 is a schematic view of a first step of the turnover positioning fixture according to the present utility model;
FIG. 10 is a schematic view of drilling, milling and chamfering the front face in a first step;
FIG. 11 is a schematic view of a second step of the turnover positioning fixture according to the present utility model;
FIG. 12 is a schematic view of the milling front face at the second step;
FIG. 13 is a schematic view of a third step of the turnover positioning fixture according to the present utility model;
FIG. 14 is a schematic view of a milled rear face at a third step;
FIG. 15 is a schematic view of a fourth step of the turnover positioning fixture according to the present utility model;
fig. 16 is a schematic view of chamfering the back surface at the fourth step.
Detailed Description
Embodiments of the present utility model will be further described with reference to the accompanying drawings.
As shown in fig. 1 to 16, in the embodiment of the turnover positioning fixture of the present utility model, the workpiece 11 is processed as an example, and drilling, chamfering and milling are required to be performed on the front surface of the workpiece 11, milling is performed on the front end surface and the rear end surface of the workpiece, and then chamfering is performed on the drilled hole by the rear surface of the workpiece.
The turnover positioning fixture comprises a base 1 and a rotating shaft mounting seat 2 assembled on the base 1, wherein a turnover workbench 15 is rotatably assembled on the rotating shaft mounting seat 2, and the rotating axis of the turnover workbench 15 is a horizontal axis. The turnover positioning fixture also comprises a control mechanism 3 for controlling the turnover of the turnover workbench 15. Fixed compression block 6 is fixed on one side of turnover workbench 15, L-shaped positioning tables are arranged on the left side and the right side of fixed compression block 6, movable compression block 4 is arranged on the left end and the right end of fixed compression block 6, movable compression block 4 can move along the left-right direction and compress workpiece 11 together with fixed compression block 6, supporting block (not marked in the figure) located below workpiece 11 is fixed on turnover workbench 15, and the supporting block and L-shaped positioning tables are located on the same plane. The guide blocks 5 are arranged on the front side and the rear side of the movable compression block 4, the guide blocks 5 can be matched with the movable compression block 4 in a sliding contact manner in the left-right direction, and the movement of the movable compression block 4 is guided to position and compress the workpiece 11. In this embodiment, the movable compression block 4 is fixedly mounted on the output end of the first hydraulic cylinder 13, and can reciprocate with the extension and retraction of the first hydraulic cylinder 13.
The fixed pressing block 6 is also provided with a movable pressing plate 8, the movable pressing plate 8 can move along the up-down direction, the movable pressing plate 8 is provided with a part which can extend to the upper part of the workpiece 11, and the workpiece 11 can be pressed on the turnover workbench 15 in the downward moving process of the movable pressing plate 8. In this embodiment, the lower end of the movable platen 8 is a pressing portion. The movable pressing plate 8 is fixedly arranged on the output end of the second hydraulic cylinder 14 and can move up and down along with the extension and retraction of the second hydraulic cylinder 14. The movable pressing plate 8 is provided with a yielding groove 9, and the yielding groove 9 forms a yielding channel for processing on the front surface of the workpiece 11 after processing tools such as a drill bit pass through.
The fixed compression block 6, the movable compression block 4 and the compression plate 8 together form a compression mechanism for positioning the workpiece 11. The pressing mechanism can position and press the workpiece 11 on the turnover workbench 15, but in the pressing process of the pressing mechanism, the front and back directions of the workpiece 11 are not subjected to the positioning action of other positioning structures, and the workpiece 11 is easy to move along the front and back directions. Based on this problem, an end face positioning column 10 which can be extended and contracted up and down is provided on the tilting table 15, and the lower end of the end face positioning column 10 is fixedly installed on the output end of the third hydraulic cylinder 12, and can be moved up and down in response to the extension and retraction of the third hydraulic cylinder 12. The end face positioning column 10 can be engaged with the front end face of the workpiece 11 in a stopper manner in the front-rear direction, thereby positioning the workpiece 11.
The turnover positioning fixture further comprises a hydraulic power device 16 and a numerical control device 17, wherein the hydraulic power device 16 is connected with each hydraulic cylinder through a hydraulic circuit 18.
The main hydraulic circuit 18 is provided with a plurality of branch hydraulic circuits which are communicated with the main hydraulic circuit 18 and each hydraulic cylinder, each branch hydraulic circuit is respectively provided with an electromagnetic valve, the corresponding branch hydraulic circuit can be controlled to be conducted and closed through the opening and closing of the electromagnetic valve, and then the clamping process is realized (namely, the front end face positioning column 10 of the workpiece is pressed by the pressing mechanism to stretch out for workpiece leaning to perform preset positioning, and the rear end face positioning column 10 of the workpiece is pressed by the pressing mechanism to retract). Simultaneously, the pressing mechanism can be ensured to be opened firstly and then the end face positioning column 10 stretches out when the pressing mechanism is opened after the processing is completed. In this embodiment, the overturning positioning fixture further includes a control system for controlling the opening and closing sequence of the electromagnetic valves. The embodiment also comprises a control system, and the control system can control the opening and closing of the electromagnetic valves according to the set sequence.
In this embodiment, the through hole is formed in the turnover base, so that the drill and other processing tools can process the workpiece after passing through, and the workpiece can be completely positioned and fixed on the turnover substrate, so that the workpiece is prevented from being suspended on the turnover substrate due to the drilling requirement.
The processing process of the workpiece in the utility model is as follows: the blank of the workpiece 11 in this embodiment is a T-shaped profile 19, most of the anticipated 20 being removed beforehand on the stamping equipment. Subsequent machining of the workpiece 11 after removal of the expectation 20 includes drilling, milling and chamfering the front face 21, chamfering the drill on the back face 24, and milling the front face 22 of the workpiece 11 and the rear face 23 of the workpiece 11.
During initial machining, the end face positioning column is in an extended state, and during machining, the hydraulic power unit 16 supplies oil to each hydraulic cylinder through the main hydraulic circuit 18. When oil is supplied, firstly, the electromagnetic valve corresponding to the first hydraulic cylinder 13 is conducted, the first hydraulic cylinder 13 is driven, and the first hydraulic cylinder 13 drives the movable compression block 4 and the fixed compression block 6 to compress the workpiece 11 together; and then the electromagnetic valve corresponding to the second hydraulic cylinder 14 is conducted, and the second hydraulic cylinder 14 is driven to drive the movable pressing plate 8 to press on the workpiece 11. At this time, the workpiece 11 is positioned and pressed against the reversing table. At this time, the third hydraulic cylinder 12 is correspondingly conducted, the third hydraulic cylinder 12 drives the end face positioning column 10 to retract, and the stop with the workpiece 11 is released. The workpiece 11 is mounted on the flipping table in the orientation shown in fig. 9 with the front side of the workpiece 11 facing upward and drilling, milling and chamfering operations are performed on the front side 21 with a drill. The turn table is then rotated 90 ° so that the front end face 22 of the workpiece 11 is disposed upward, and the front end face 22 is milled by a milling cutter. The turnover table is then rotated 180 ° clockwise or counterclockwise to place the rear end face 23 of the workpiece 11 upward, and the rear end face 23 is milled by a milling cutter. And then rotated by 90 degrees to arrange the back 24 of the workpiece 11 upwards, and chamfering the drilled holes. After the processing is completed, the overturning workbench is placed at an initial position. And controlling each hydraulic cylinder to lift the movable pressing plate, releasing the pressing of the movable pressing block on the workpiece 11, and returning the end face positioning column to the original position to take out the workpiece, so that the whole processing process is finished.
In this embodiment, the turnover workbench is a turnover base, and the position on the turnover base for placing the workpiece is a placement position. In this embodiment, the end face positioning posts constitute end positioning members that are located beside the placement site. The third hydraulic cylinder constitutes the driving mechanism. In this embodiment, the end positioning member is telescopically assembled on the flip base, and in other embodiments, the end positioning member may be detachably assembled on the flip base, and when the end positioning member is not needed, the end positioning member may be detached from the flip base.
In this embodiment, the through hole is formed in the turnover base, so that the drill and other processing tools can process the workpiece after passing through, and the workpiece can be completely positioned and fixed on the turnover substrate, so that the workpiece is prevented from being suspended on the turnover substrate due to the drilling requirement.
In this embodiment, the end position is in the blocking position when the end position is in the blocking position and is in the removal position when the end position is out of the way with the workpiece.
Claims (6)
1. The utility model provides a upset positioning fixture, includes the base and rotates the upset base of locating on the base around horizontal axis, is equipped with the position of placing that is used for placing the work piece on the upset base, still is equipped with the hold-down mechanism who is used for compressing tightly the work piece on the upset base, its characterized in that: a through hole penetrating through the turnover base for processing the workpiece after the processing tool passes through is formed in the placement position of the turnover base; the side of the placing position on the overturning base is detachably or telescopically provided with an end positioning piece, and the end positioning piece is provided with a stop position for being in stop fit with the surface to be processed of the workpiece so as to press the workpiece by the pressing mechanism and a moving position moved away from the surface to be processed of the workpiece; the pressing mechanism comprises pressing blocks which can move relatively along the left-right direction to position and clamp the two sides of the workpiece, and the end positioning piece is arranged on one side of the placing position along the front-back direction; the pressing mechanism further comprises a movable pressing plate which is arranged above the placing position and is assembled on the overturning base in a telescopic way along the up-down direction, and a yielding channel for a processing tool to pass through for processing a workpiece below the movable pressing plate is arranged on the movable pressing plate; the blank of the workpiece is a T-shaped section, the anticipated material is removed in advance on a stamping device, the workpiece is subjected to subsequent processing after the anticipated material is removed, the subsequent processing comprises drilling, milling and chamfering on the front surface, chamfering on the drilling on the back surface, milling on the front end surface of the workpiece and milling on the back end surface of the workpiece; the end face of the workpiece, which is positioned and blocked with the pre-positioning piece, is the front end face.
2. The flip positioning fixture of claim 1, wherein: the end positioning piece is an end surface positioning column which is telescopically assembled on the overturning base.
3. The flip positioning fixture of claim 2, wherein: the overturning positioning fixture comprises a hydraulic driving mechanism for driving the end face positioning column to stretch out and draw back, and the hydraulic driving mechanism comprises a hydraulic cylinder with an output end provided with the end face positioning column.
4. A flip positioning jig according to any one of claims 1-3, wherein: the two sides of the pressing blocks comprise fixed pressing blocks fixedly arranged on the overturning base and movable pressing blocks assembled on the overturning base in a guiding and moving manner, and guide blocks matched with the movable pressing blocks in a guiding and moving manner in the left-right direction are fixedly arranged on the overturning base.
5. The flip positioning fixture of claim 4, wherein: an L-shaped step for positioning and clamping in a workpiece is arranged on the end face of one end, facing the movable compression block, of the fixed compression block.
6. The flip positioning fixture of claim 4, wherein: the movable compression blocks are arranged on the left side and the right side of the fixed compression block respectively, and the number of the placement positions is two correspondingly and arranged between the corresponding movable compression blocks and the fixed compression blocks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711117892.3A CN107825164B (en) | 2017-11-13 | 2017-11-13 | Overturning positioning fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711117892.3A CN107825164B (en) | 2017-11-13 | 2017-11-13 | Overturning positioning fixture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107825164A CN107825164A (en) | 2018-03-23 |
| CN107825164B true CN107825164B (en) | 2023-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711117892.3A Active CN107825164B (en) | 2017-11-13 | 2017-11-13 | Overturning positioning fixture |
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| CN (1) | CN107825164B (en) |
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| CN110561152A (en) * | 2019-09-25 | 2019-12-13 | 常熟建华模具科技股份有限公司 | Clamp structure for processing choke plug of glass mold |
| CN112171344A (en) * | 2020-11-03 | 2021-01-05 | 肖世涛 | Hydraulic clamp capable of overturning |
| CN112571556A (en) * | 2021-01-28 | 2021-03-30 | 博罗县昶丰精密机械设备有限公司 | A upset anchor clamps equipment for processing of compound tenon fourth of twelve earthly branches |
| CN113639689A (en) * | 2021-09-09 | 2021-11-12 | 中国航发南方工业有限公司 | Automatic overturning and positioning tool fixture and three-coordinate measuring machine |
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