Tool with high repeated positioning precision

Abstract

The invention relates to the field of positioning tools, and particularly discloses a tool with high repeated positioning precision. A hydraulic transmission assembly, a rotating abutting assembly and a clamping ball are arranged in the first mounting cylinder, in the machining process, after a user inserts a conical rod into the first mounting cylinder, the hydraulic transmission assembly can be controlled to drive the rotating abutting assembly, and the rotating abutting assembly can drive the double-layer clamping ball to move in the rotating process; the double-layer clamping balls abut against the upper side and the lower side of the curved surface of the side wall of the cone rod, the stress point positions of the cone rod are increased, then the connection rigidity of the cone rod is improved, the situation that the position of the cone rod deviates in the high-load or vibration machining environment is avoided, and then the machining error is effectively reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of positioning jigs, and particularly relates to a jig with high repeated positioning accuracy. Background Art

[0002] During the process of machining parts, it is necessary to use jigs and fixtures to limit the parts or materials to be machined, so as to facilitate the machining by the cutting tool. The existing types of jigs and fixtures include three-jaw chucks, pliers, etc. Later, a zero-point positioning system with higher positioning accuracy appeared. The zero-point positioning system is arranged on the base, then the taper rod is connected inside the zero-point positioning system, and the taper rod is used to limit the workpiece to be machined.

[0003] The applicant found during use that the existing zero-point positioning system has defects during use. The existing zero-point positioning system realizes positioning through the clamping of the clamping balls. The inner ring rises under the action of elastic materials such as springs and abuts against one side of the clamping balls. The clamping balls are pushed by the inner ring and move towards the axis position of the inner ring, and then abut against the taper rod. Under the tightening action of the clamping balls, the taper rod stays stably in the inner ring. However, this connection method has defects. The connection points between the clamping balls and the taper rod are distributed in one layer, and there are fewer support points for the taper rod. When machining in a high-load or vibration environment, the existing zero-point positioning system will have a problem of insufficient connection rigidity, resulting in deviation of the position of the taper rod, and further generating machining errors. Summary of the Invention

[0004] In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a jig with high repeated positioning accuracy, so as to solve the problem that when the existing zero-point positioning system is used in a high-load or vibration environment, there will be insufficient connection rigidity, resulting in deviation of the position of the taper rod, and further generating machining errors.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A jig with high repeated positioning accuracy includes:

[0007] A first installation cylinder, on which a transmission medium pipe and a first air pipe are connected;

[0008] A hydraulic transmission component, arranged inside the first installation cylinder;

[0009] A rotating and tightening component, arranged inside the first installation cylinder and rotating under the transmission action of the hydraulic transmission component;

[0010] A third installation cylinder, arranged inside the first installation cylinder and sleeved outside the rotating and tightening component, and an upper installation ring is connected to the third installation cylinder;

[0011] The ball is arranged on the rotating and pressing component and moves towards the axis position of the tooling under the driving action of the rotating and pressing component;

[0012] The cover plate is arranged on the first mounting cylinder and connects the upper mounting ring and the first mounting cylinder through fixing bolts;

[0013] The tapered rod is inserted in the middle of the first mounting cylinder.

[0014] Preferably, the hydraulic transmission component includes a partition fixedly connected inside the first mounting cylinder and a second mounting cylinder rotatably connected to the middle of the first mounting cylinder. A sealed chamber is formed between the second mounting cylinder and the first mounting cylinder, and the second mounting cylinder abuts against the partition. Two first side plates are fixedly connected to the second mounting cylinder and are respectively located on both sides of the partition. Two sealed chambers are formed between the two first side plates and the partition, and the two transmission medium pipes are respectively communicated with the two sealed chambers.

[0015] Preferably, the rotating and pressing component includes a lower mounting ring, a vertical plate fixedly connected to the lower mounting ring, and an intermediate plate fixedly installed in the middle of the vertical plate. Blocks are fixedly connected to both the lower mounting ring and the intermediate plate on one side of the vertical plate, and the second mounting cylinder is in transmission connection with the lower mounting ring.

[0016] Preferably, a jack is formed on the vertical plate and penetrates through the lower mounting ring and extends to the second mounting cylinder. A plug rod is inserted into the jack. The upper end of the plug rod is arranged in a T shape, and a placement groove and a clamping groove for clamping the plug rod are formed at the upper end of the vertical plate.

[0017] Preferably, the third mounting cylinder is sleeved outside the vertical plate, and a baffle is fixedly connected to the inner wall of the third mounting cylinder on one side of the block. The ball is clamped between the block and the baffle.

[0018] Preferably, a plurality of second side plates are fixedly connected to the outer wall of the third mounting cylinder in an annular array. The first air pipe is communicated with the inside of the first mounting cylinder and faces the second side plates.

[0019] Preferably, the inner walls of the lower mounting ring and the intermediate plate on the side close to the tapered rod bulge upwards.

[0020] Preferably, the lower surface of the cover plate abuts against the upper end of the vertical plate.

[0021] Preferably, a positioning ring for limiting the second mounting cylinder is connected to the bottom of the inner wall of the first mounting cylinder, and a second air pipe is connected to the middle of the positioning ring.

[0022] Preferably, a sealing ring is connected to the second mounting cylinder and abuts against the inner wall of the first mounting cylinder.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] In the present invention, by arranging a hydraulic transmission component, a rotating pressing component and a clamping ball inside the first installation cylinder, during the processing, after the user inserts the tapered rod into the first installation cylinder, the user can control the hydraulic transmission component to drive the rotating pressing component. During the rotation process, the rotating pressing component will drive the double-layer clamping ball to displace, so that the double-layer clamping ball abuts against the upper and lower sides of the curved surface of the side wall of the tapered rod, increasing the stress points of the tapered rod, thereby improving the connection rigidity of the tapered rod and avoiding deviation of the position of the tapered rod in a high-load or vibration processing environment, and effectively reducing the processing error. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 is a schematic diagram of the overall sectional structure of the present invention Figure 1 ;

[0027] Figure 3 is a schematic diagram of the overall sectional structure of the present invention Figure 2 ;

[0028] Figure 4 is a schematic diagram of the overall sectional structure of the present invention Figure 3 ;

[0029] Figure 5 is a schematic diagram of the structure of the third installation cylinder of the present invention;

[0030] Figure 6 is a schematic diagram of the connection structure of the second installation cylinder, the lower installation ring and the vertical plate of the present invention;

[0031] In the figure: 1, first installation cylinder; 2, cover plate; 3, fixing bolt; 4, transmission medium pipe; 5, first air pipe; 6, partition board; 7, second installation cylinder; 8, first side plate; 9, sealing ring; 10, positioning ring; 11, second air pipe; 12, lower installation ring; 13, vertical plate; 14, intermediate plate; 15, abutting block; 16, jack; 17, clamping groove; 18, inserting rod; 19, third installation cylinder; 20, upper installation ring; 21, second side plate; 22, baffle plate; 23, clamping ball; 24, tapered rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0033] Embodiment:

[0034] Please refer to Figure 1 - Figure 6 As shown, a tooling with high repeat positioning accuracy includes:

[0035] The first mounting cylinder 1, on which a transmission medium pipe 4 and a first air pipe 5 are connected. The transmission medium pipe 4 is connected with a transmission medium, which can be gas, liquid, or other transmission media. The first air pipe 5 is connected with a pneumatic component for spraying high-pressure gas into the first air pipe 5;

[0036] A hydraulic transmission component is arranged inside the first mounting cylinder 1;

[0037] A rotating and pressing component is arranged inside the first mounting cylinder 1 and rotates under the transmission of the hydraulic traditional component;

[0038] The third mounting cylinder 19 is arranged inside the first mounting cylinder 1 and sleeved outside the rotating and pressing component, and an upper mounting ring 20 is connected to the third mounting cylinder 19;

[0039] The clamping ball 23 is arranged on the rotating and pressing component and moves towards the axis position of the tooling under the transmission of the rotating and pressing component;

[0040] The cover plate 2 is arranged on the first mounting cylinder 1 and connects the upper mounting ring 20 and the first mounting cylinder 1 through a fixing bolt 3;

[0041] The tapered rod 24 is inserted in the middle of the first mounting cylinder 1. The tapered rod 24 can be a common tapered rod of the zero-point positioning system, with a gourd-shaped appearance and a curved surface in the middle of the side wall.

[0042] As can be seen from the above, by arranging a hydraulic transmission component, a rotating and pressing component, and a clamping ball 23 inside the first mounting cylinder 1, during the processing, after the user inserts the tapered rod 24 into the first mounting cylinder 1, the user can control the hydraulic transmission component to drive the rotating and pressing component. During the rotation process, the rotating and pressing component will drive the double-layer clamping ball 23 to displace, so that the double-layer clamping ball 23 abuts against the upper and lower sides of the curved surface of the tapered rod side wall, increasing the stress points of the tapered rod 24, thereby improving the connection rigidity of the tapered rod 24 and avoiding the deviation of the position of the tapered rod 24 in a high-load or vibration processing environment, and effectively reducing the processing error.

[0043] Please refer to Figure 2 - Figure 4As shown, the hydraulic transmission assembly includes a partition plate 6 fixedly connected inside the first mounting cylinder 1 and a second mounting cylinder 7 rotatably connected to the middle of the first mounting cylinder 1. A sealed chamber is formed between the second mounting cylinder 7 and the first mounting cylinder 1, and the second mounting cylinder 7 abuts against the partition plate 6. Two first side plates 8 are fixedly connected to the second mounting cylinder 7 and are respectively located on both sides of the partition plate 6. Two sealed chambers are formed between the two first side plates 8 and the partition plate 6. The two transmission medium pipes 4 are respectively communicated with the two sealed chambers. A sealing ring 9 is connected to the second mounting cylinder 7 and abuts against the inner wall of the first mounting cylinder 1. The sealing ring 9 is used to enhance the peripheral sealing performance of the second mounting cylinder 7.

[0044] When the hydraulic transmission assembly is driven, a transmission medium is input into the sealed chamber through a transmission medium pipe 4. At this time, the amount of the transmission medium in the sealed chamber increases, and the transmission medium will push the second mounting cylinder 7 through the first side plate 8, causing the second mounting cylinder 7 to rotate and transmitting power through the second mounting cylinder 7.

[0045] Please refer to Figure 4 - Figure 6 As shown, the rotation and clamping assembly includes a lower mounting ring 12, a vertical plate 13 fixedly connected to the lower mounting ring 12, and an intermediate plate 14 fixedly installed in the middle of the vertical plate 13. Clamping blocks 15 are fixedly connected to both the lower mounting ring 12 and the intermediate plate 14 and are located on one side of the vertical plate 13. The second mounting cylinder 7 is in transmission connection with the lower mounting ring 12. To prevent the clamping ball 23 from rolling off the lower mounting ring 12 and the intermediate plate 14, the inner walls of the lower mounting ring 12 and the intermediate plate 14 close to the conical rod 24 bulge upward.

[0046] When the second mounting cylinder 7 rotates, the second mounting cylinder 7 will drive the lower mounting ring 12 to rotate during the rotation process. The rotating lower mounting ring 12 will rotate through the vertical plate 13, the intermediate plate 14 and the clamping block 15. The shape of the clamping block 15 is a special shape, which is integrally arranged in a right-angled triangular pyramid shape. The inclined surface of the clamping block 15 faces the clamping ball 23, and the overall shape is larger at the bottom and smaller at the top. When the clamping block 15 approaches the clamping ball 23, it will squeeze the clamping ball 23 outwards.

[0047] A jack hole 16 is formed in the vertical plate 13, penetrating through the lower mounting ring 12 and extending to the second mounting cylinder 7. A plug rod 18 is inserted into the jack hole 16. The upper end of the plug rod 18 is arranged in a T shape. A placement groove and a clamping groove 17 for clamping the plug rod 18 are formed at the upper end of the vertical plate 13. The placement groove has a lower slot position, is arranged on the vertical plate 13, and communicates with the upper end of the vertical plate 13. The clamping groove 17 is directly arranged at the upper end of the vertical plate 13. The placement groove communicates with the clamping groove 17. The lower surface of the cover plate 2 abuts against the upper end of the vertical plate 13. When the plug rod 18 is inserted into the jack hole 16, the plug rod 18 penetrates through and connects the vertical plate 13, the lower mounting ring 12, and the second mounting cylinder 7 up and down. When the upper end of the plug rod 18 is clamped inside the clamping groove 17, the lower end of the plug rod 18 is separated from contact with the second mounting cylinder 7. Moreover, the cover plate 2 can limit the plug rod 18 from disengaging from the placement groove. And when the upper end of the plug rod 18 is displaced inside the clamping groove 17, the cover plate 2 cannot be reset.

[0048] The third mounting cylinder 19 is sleeved outside the vertical plate 13. A baffle 22 located on one side of the abutting block 15 is fixedly connected to the inner wall of the third mounting cylinder 19. The clamping ball 23 is clamped between the abutting block 15 and the baffle 22. When the abutting block 15 pushes the clamping ball to rotate, the third mounting cylinder 19 and the baffle 22 are stationary. At this time, the abutting block 15 and the baffle 22 will clamp the clamping ball 23. Since the side of the abutting block 15 close to the clamping ball 23 is inclined, the abutting block 15 will push the clamped clamping ball 23 outwards, so that the clamping ball 23 abuts against the side wall curved surface of the tapered rod 24.

[0049] A plurality of second side plates 21 are fixedly connected to the outer wall of the third mounting cylinder 19 in an annular array. The first air pipe 5 communicates with the inside of the first mounting cylinder 1 and faces the second side plates 21. Because there is often a part of processing debris remaining in the middle of the tooling, these processing debris will affect the accuracy of the clamping ball 23. Therefore, it is necessary to clean out the residual debris after use. At this time, the fixing bolt 3 and the cover plate 2 can be removed, and then the plug rod 18 is toggled outwards to disengage it from the second mounting cylinder 7. At this time, the first air pipe 5 is inflated, and the second side plates 21 are driven by the gas, and the third mounting cylinder 19 is driven to rotate by the second side plates 21. The rotating third mounting cylinder 19 drives the lower mounting ring 12 and the middle plate 14 to rotate through the baffle 22 and the abutting block 15. At this time, the debris falling on the lower mounting ring 12 and the middle plate 14 will rotate together, and the debris is transferred to the middle of the first mounting cylinder 1 for removal.

[0050] A positioning ring 10 for limiting the second mounting cylinder 7 is connected to the bottom of the inner wall of the first mounting cylinder 1. The positioning ring 10 clamps the second mounting cylinder 7, so that the second mounting cylinder 7 can rotate stably in the first mounting cylinder 1. A second air pipe 11 is connected to the middle of the positioning ring 10. The user can ventilate the middle of the second air pipe 11 and blow out the processing waste residue in the middle of the first mounting cylinder 1 with gas.

[0051] During use, the user can insert the tapered rod 24 into the middle of the first mounting cylinder 1, and then input the transmission medium through the transmission medium pipe 4. The transmission medium drives the second mounting cylinder 7 to rotate through the first side plate 8. The second mounting cylinder 7 drives the lower mounting ring 12, the vertical plate 13, the intermediate plate 14 and the abutting block 15 to rotate through the insertion rod 18. The rotating abutting block 15 drives the clamping ball 23 to move and contact the baffle 22. Under the block of the baffle 22, the abutting block 15 will push the clamping ball 23 outwards, so that the clamping ball 23 contacts the side wall curved surface of the tapered rod 24. Since there are two layers of clamping balls 23, the tapered rod 24 is more stable in force and stronger in impact resistance. When it is necessary to remove the processing waste residue inside the first mounting cylinder 1, the user can remove the fixing bolts 3 and the cover plate 2, and then lift the insertion rod 18 upwards so that the upper end of the insertion rod 18 hangs in the card slot 17. At this time, the first air pipe 5 is inflated, and the gas pushes the third mounting cylinder 19 through the second side plate 21. The third mounting cylinder 19 pushes the horizontal and vertical plates 13 through the baffle 22, and the vertical plate 13 drives the lower mounting ring 12 and the intermediate plate 14 to rotate. At this time, the processing residues remaining on the lower mounting ring 12 and the intermediate plate 14 will gradually move to the axial center position of the first mounting cylinder 1, and the residues can be blown out of the first mounting cylinder 1 through the air outlet of the second air pipe 11. Then, the insertion rod 18 and the cover plate 2 can be reinstalled in place.

[0052] The standard parts used in the present invention can all be purchased from the market. The special-shaped parts can be customized according to the descriptions in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, welding, etc. that are mature in the prior art. The machines, parts and equipment all adopt conventional models in the prior art. In addition, the circuit connection adopts the conventional connection method in the prior art, which will not be elaborated here. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0053] In the description of the present invention, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. The meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0054] In the present invention, unless otherwise clearly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0055] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply indicates that the horizontal height of the first feature is less than that of the second feature.

[0056] In the description of this specification, the description with reference to terms such as "an embodiment", "some embodiments", "examples", "specific examples" or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not have to be directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0057] In the drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are involved, and other structures can refer to the general design. Without conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

Claims

1. A tool with high repeatability, characterized in that: include: A first installation cylinder (1), to which a transmission medium pipe (4) and a first air pipe (5) are connected; A hydraulic transmission assembly, arranged inside the first mounting cylinder (1); A rotating abutting assembly is arranged inside the first mounting cylinder (1) and rotates under the transmission action of the hydraulic conventional assembly; A third mounting tube (19) is arranged inside the first mounting tube (1) and sleeved outside the rotating and tightening assembly, and an upper mounting ring (20) is connected to the third mounting tube (19); A clamping ball (23) is arranged on the rotating and tightening assembly and moves toward the axis center position of the tooling under the transmission action of the rotating and tightening assembly; A cover plate (2) is arranged on the first mounting tube (1) and is connected to the upper mounting ring (20) and the first mounting tube (1) via fixing bolts (3); The tapered rod (24) is inserted in the middle of the first mounting tube (1).

2. A tooling with high repeatability positioning accuracy according to claim 1, characterized in that: The hydraulic transmission assembly comprises a partition (6) fixedly connected to the inside of the first mounting cylinder (1) and a second mounting cylinder (7) rotatably connected to the middle part of the first mounting cylinder (1), and a sealed chamber is formed between the second mounting cylinder (7) and the first mounting cylinder (1), and the second mounting cylinder (7) abuts against the partition (6), and two first side plates (8) are fixedly connected to the second mounting cylinder (7) and are respectively located on both sides of the partition (6), and the two first side plates (8) and the partition (6) form two sealed chambers, and the two transmission medium pipes (4) are respectively connected to the two sealed chambers.

3. A tooling with high repeatability positioning accuracy according to claim 2, characterized in that: The rotating clamping assembly comprises a lower mounting ring (12), a vertical plate (13) fixedly connected to the lower mounting ring (12), and an intermediate plate (14) fixedly installed in the middle of the vertical plate (13); the lower mounting ring (12) and the intermediate plate (14) are both fixedly connected with a clamping block (15) located on one side of the vertical plate (13); and the second mounting cylinder (7) is drivingly connected to the lower mounting ring (12).

4. A tooling with high repeatability positioning accuracy according to claim 3, characterized in that: The vertical plate (13) is provided with a plug hole (16) which passes through the lower mounting ring (12) and extends to the second mounting tube (7); a plug rod (18) is inserted into the plug hole (16); the upper end of the plug rod (18) is arranged in a T-shape; and the upper end of the vertical plate (13) is provided with a placement groove and a clamping groove (17) for clamping the plug rod (18).

5. A tooling with high repeatability positioning accuracy according to claim 4, characterized in that: The third installation tube (19) is sleeved on the outside of the vertical plate (13), and the inner wall of the third installation tube (19) is fixedly connected with a baffle (22) located on one side of the stop block (15), and the locking ball (23) is locked between the stop block (15) and the baffle (22).

6. A tooling with high repeatability positioning accuracy according to claim 4, characterized in that: The outer wall of the third installation cylinder (19) is fixedly connected to a plurality of second side plates (21) in a circular array, and the first air pipe (5) is connected to the interior of the first installation cylinder (1) and faces the second side plate (21).

7. The tooling with high repeatability positioning accuracy according to claim 3, characterized in that: The inner walls of the lower mounting ring (12) and the middle plate (14) on one side close to the cone rod (24) are arranged to protrude upwards.

8. The tooling with high repeatability positioning accuracy according to claim 4, characterized in that: The lower surface of the cover plate (2) abuts against the upper end of the vertical plate (13).

9. The tooling with high repeatability positioning accuracy according to claim 2, characterized in that: A positioning ring (10) for limiting the position of the second mounting tube (7) is connected to the bottom of the inner wall of the first mounting tube (1), and a second air pipe (11) is connected to the middle of the positioning ring (10).

10. A tooling with high repeatability positioning accuracy according to claim 2, characterized in that: The second installation tube (7) is connected to a sealing ring (9) which abuts against the inner wall of the first installation tube (1).

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