Rotary clamping self-centering tool

Abstract

The utility model discloses a rotary clamping self-centering tool. The tool comprises a base, a clamping device, a clamping device and a clamping device, wherein the base comprises a large opening end, a small opening end and two accommodating holes in the side wall; a protruding spigot step is arranged on one side of the chuck and arranged in the small opening end of the base, and a clamping claw is arranged on the other side of the chuck and used for clamping a tool. The outer side face of the positioning disc is a conical face, and the positioning disc is installed from the large opening end of the base and connected with the chuck. The adjusting ring comprises a ring body and connecting blocks, the ring body is arranged on the outer side of the positioning disc in a sleeving mode, the top face of the ring body makes contact with the inner end face of the small opening end of the base, the inner side face of the ring body is a conical face and makes contact with the conical face of the positioning disc, and the two connecting blocks correspond to the two containing holes of the base respectively; one end of the first adjusting lead screw penetrates through one containing hole to be in threaded connection with the corresponding connecting block, and the other end of the first adjusting lead screw is in threaded connection with an adjusting head. One end of the second adjusting lead screw penetrates through the other containing hole to be in threaded connection with the corresponding connecting block, and the other end of the second adjusting lead screw is in threaded connection with an adjusting head. And rapid clamping and rotating of the workpiece are achieved.

Description

Technical Field

[0001] This utility model relates to the field of machining, and in particular to a rotary clamping self-centering tooling. Background Technology

[0002] In daily production and processing, after the workpiece has been processed in one direction, it needs to be rotated to complete the processing in other directions. This is especially true for cylindrical parts, which also involve the requirement that the central axis cannot change after rotation, that is, it must rotate around the central axis of the cylinder.

[0003] In existing technologies, workpieces are often placed on ordinary three-jaw chucks for rotary machining, but this method cannot achieve the purpose of rapid rotation, automatic centering, and positioning after rotation.

[0004] There is currently no effective solution to the aforementioned problems in the existing technology. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides a rotary clamping self-centering fixture. It achieves clamping and automatic centering of workpieces of different sizes through a rotatable chuck, accomplished by rotating the chuck. Furthermore, by controlling the adjusting screw to drive two connecting blocks on the adjusting ring to move simultaneously towards or away from each other, the chuck can be tightened or loosened. This solves the problem in existing technologies where rapid rotation, automatic centering, and post-rotation positioning are not possible.

[0006] To achieve the above objectives, this utility model provides a rotary clamping self-centering fixture, comprising: a base, the base including a large opening end and a small opening end, and two opposing receiving holes formed on its side wall; a chuck, one side of which has a protruding stop step located within the small opening end of the base, and the other side has clamping claws for clamping the fixture; a positioning plate, the outer surface of which is conical, the positioning plate being inserted into the large opening end of the base and connected to the chuck; and an adjusting ring, the adjusting ring comprising a ring body with an opening on one side and two openings on both sides. The ring body is sleeved on the outside of the positioning disk, with its top surface contacting the inner end face of the small opening of the base. The inner surface of the ring body is conical and contacts the conical surface of the positioning disk. The two connecting blocks are respectively provided with corresponding receiving holes of the base, and both connecting blocks are provided with threaded holes. One end of the first adjusting screw passes through one receiving hole and is threaded to the corresponding connecting block, and the other end is threaded to an adjusting head. One end of the second adjusting screw passes through the other receiving hole and is threaded to the corresponding connecting block, and the other end is threaded to an adjusting head.

[0007] Further optionally, the top surface of the base is provided with a ring of equally divided angle markings along the circumference; the outer side of the chuck is provided with an indicator line for aligning with the angle markings to indicate the rotation angle.

[0008] Optionally, the bottom surface of the chuck is provided with a plurality of first fixing holes; the positioning plate is provided with a plurality of second fixing holes, and the plurality of second fixing holes are provided in a one-to-one correspondence with the plurality of first fixing holes; one end of the fixing member passes through the second fixing hole and is connected to the corresponding first fixing hole.

[0009] Alternatively, the external threads of both the first adjusting screw and the second adjusting screw are trapezoidal threads.

[0010] Alternatively, the threaded holes of the two connecting blocks may be left-hand trapezoidal threads and right-hand trapezoidal threads, respectively.

[0011] Further optionally, the chuck has an opening in the middle; the positioning disk has a through hole in the middle, and a positioning ring extends from the edge of the through hole. The positioning ring can be inserted into the opening of the chuck, and the outer side of the positioning ring contacts the inner side of the opening of the chuck.

[0012] Further optionally, the chuck includes three clamping jaws.

[0013] Optionally, the outer end face of the adjusting head is provided with an internal hexagonal countersunk hole.

[0014] Optionally, the receiving hole near the outer side of the base is a countersunk hole for receiving the adjusting head.

[0015] The above technical solution has the following beneficial effects: it can realize the rapid clamping and automatic centering of cylindrical workpieces; it can realize the rotation and positioning of the clamped workpiece around the axis at any angle; it can realize the rapid fastening, rapid rotation and rapid loosening of the workpiece, reducing the clamping and alignment time; it has a simple structure, is easy to manufacture and has strong versatility. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the rotary clamping self-centering tooling provided in this embodiment of the utility model;

[0018] Figure 2 This is a three-dimensional structural schematic diagram of the rotary clamping self-centering tooling provided in another embodiment of the present invention;

[0019] Figure 3This is a schematic diagram of the structure of the base provided in this embodiment of the utility model;

[0020] Figure 4 This is a schematic diagram of the chuck structure provided in an embodiment of the present invention;

[0021] Figure 5 This is a structural schematic diagram of the chuck provided in another embodiment of the present invention;

[0022] Figure 6 This is a schematic diagram of the positioning disk provided in an embodiment of the present utility model;

[0023] Figure 7 This is a schematic diagram of the structure of the adjusting ring provided in an embodiment of the present invention;

[0024] Figure 8 This is a partial assembly diagram provided by an embodiment of the present utility model;

[0025] Figure 9 This is a cross-sectional structural schematic diagram of the rotary clamping self-centering tooling provided in this embodiment of the utility model;

[0026] Figure 10 This is a top view of the rotary clamping self-centering tooling provided in this embodiment of the utility model.

[0027] Figure 11 This is a side view of the rotary clamping self-centering tooling provided in this embodiment of the utility model.

[0028] Reference numerals: 1-Base; 101-Accommodation hole; 102-Angle marking; 2-Chuck; 201-Clamping claw; 202-Stop step; 203-First fixing hole; 204-Indicator line; 3-Positioning plate; 301-Second fixing hole; 302-Positioning ring; 4-Adjusting ring; 401-Ring body; 402-Connecting block; 403-Threaded hole; 5-First adjusting screw; 6-Second adjusting screw; 7-Adjusting head; 8-Fixing component. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] To address the problems of workpieces not being able to rotate, clamp, and self-center quickly in existing technologies, this utility model provides a rotary clamping self-centering fixture, comprising: a base 1, which includes a large opening end and a small opening end, and two opposing receiving holes 101 on its side wall; a chuck 2, which has a protruding stop step 202 on one side, the stop step 202 being located inside the small opening end of the base 1, and a clamping claw 201 on the other side for clamping the fixture; a positioning plate 3, the outer surface of which is conical, the positioning plate 3 being inserted into the large opening end of the base 1 and connected to the chuck 2; and an adjusting ring 4, which includes a ring body 401 with an opening on one side and two openings on the other side. Connecting blocks 402 extending outward from the sides, and ring 401 sleeved on the outside of positioning disk 3, with the top surface in contact with the inner end face of the small opening of base 1. The inner surface of ring 401 is conical and in contact with the conical surface of positioning disk 3. Two connecting blocks 402 are respectively provided with two receiving holes 101 of base 1. Both connecting blocks 402 are provided with threaded holes 403. One end of the first adjusting screw 5 passes through one receiving hole 101 and is threaded to the corresponding connecting block 402, and the other end is threaded to the adjusting head 7. One end of the second adjusting screw 6 passes through the other receiving hole 101 and is threaded to the corresponding connecting block 402, and the other end is threaded to the adjusting head 7.

[0031] Figure 1 This is a three-dimensional structural schematic diagram of the rotary clamping self-centering tooling provided in an embodiment of this utility model, as shown below. Figure 1 As shown, the diameter of the base 1 in the tooling is larger than the diameter of the chuck 2. Part of the chuck 2 is located in the base 1, and the other part protrudes from the surface of the base 1. Figure 2 This is a three-dimensional structural schematic diagram of the rotary clamping self-centering tooling provided in another embodiment of the present invention, as shown below. Figure 2 As shown, the tooling also includes a positioning plate 3, an adjusting ring 4, a first adjusting screw 5, a second adjusting screw 6, and an adjusting head 7.

[0032] Figure 3 This is a schematic diagram of the structure of the base provided in an embodiment of the present invention, as shown below. Figure 3 As shown, both ends of the base 1 are open, and the diameter of the opening at one end is larger than the diameter of the opening at the other end. That is, the base 1 includes a large opening end and a small opening end, and two receiving holes 101 are also provided on the outer side of the base 1.

[0033] Figure 4 This is a schematic diagram of the chuck structure provided in an embodiment of the present invention. Figure 5 This is a structural schematic diagram of the chuck provided in another embodiment of the present invention, as shown below. Figure 4 , Figure 5As shown, one end face of the chuck 2 is provided with a protruding stop step 202. The diameter of the stop step 202 is smaller than the diameter of the chuck 2 body and also smaller than the diameter of the small port of the base 1, so as to ensure that the stop step 202 can enter the small port of the base 1, thereby realizing the rotation of the chuck 2 relative to the base 1. The other end face of the chuck 2 is provided with a clamping jaw 201, which is designed with multiple sizes of steps to realize the clamping of workpieces of different sizes.

[0034] Figure 6 This is a schematic diagram of the positioning disk provided in an embodiment of the present invention, as shown below. Figure 6 As shown, the outer surface of the positioning disk 3 is a conical surface, and the maximum diameter of the positioning disk 3 is smaller than the diameter of the large port of the base 1, so that the positioning disk 3 can be inserted from the large port of the base 1.

[0035] Figure 7 This is a schematic diagram of the structure of the adjusting ring provided in an embodiment of the present invention, as shown below. Figure 7 As shown, the adjusting ring 4 includes an open ring body 401 and connecting blocks 402. There are two connecting blocks 402, which are respectively located on both sides of the opening. Each connecting block 402 has a threaded hole 403. The inner surface of the ring body 401 is a conical surface, which is adapted to the outer conical surface of the positioning plate 3.

[0036] Figure 8 This is a partial assembly diagram provided by an embodiment of the present utility model, such as... Figure 8 As shown, the inner conical surface of the adjusting ring 4 mates with the outer conical surface of the positioning disk 3 so that the adjusting ring 4 is sleeved on the outside of the positioning disk 3. The first adjusting screw 5 is threadedly connected to one of the connecting blocks 402, and the second adjusting screw 6 is threadedly connected to the other connecting block 402. Both the first adjusting screw 5 and the second adjusting screw 6 are connected to adjusting blocks. When the adjusting blocks are controlled to rotate the screws, the two connecting blocks 402 can move towards each other or away from each other.

[0037] Figure 9 This is a cross-sectional structural diagram of the rotary clamping self-centering tooling provided in an embodiment of the present invention, as shown below. Figure 9 As shown, the stop step 202 of the chuck 2 is inserted into the small port of the base 1 and can rotate within the small port of the base 1. The positioning disk 3 enters from the large port of the base 1 and is fixedly connected to the chuck 2. The top surface of the adjusting ring 4 contacts the inner end face of the small port of the base 1, and the adjusting ring 4 is sleeved on the outside of the positioning disk 3, with its inner conical surface contacting the outer conical surface of the positioning disk 3. Along the tooling axis, the adjusting ring 4 is sandwiched between the base 1 and the positioning disk 3.

[0038] The first adjusting screw 5 passes through the receiving hole 101 on one side and connects to the threaded hole 403 of a connecting block 402. The second adjusting screw 6 passes through the receiving hole 101 on the other side and connects to the threaded hole 403 of another connecting block 402. Both the first adjusting screw 5 and the second adjusting screw 6 are connected to an adjusting head 7.

[0039] When the workpiece needs to be fixed, rotating the adjusting head 7 drives the first adjusting screw 5 and the second adjusting screw 6 to rotate, causing the two connecting blocks 402 of the adjusting ring 4 to move towards each other. The distance between the two connecting blocks 402 gradually decreases, and the adjusting ring 4 contracts circumferentially (its diameter decreases). The inner conical surface of the adjusting ring 4 exerts a downward squeezing force on the positioning disk 3 and an upward squeezing force on the base 1. At this time, the squeezing force of the adjusting ring 4 on the base 1 and the positioning disk 3, as well as the increased clamping force between them, makes the positioning disk 3 secure. Since the chuck 2 is fixedly connected to the positioning disk 3, the chuck 2 is also secured, and the workpiece is thus fixed.

[0040] When the workpiece needs to rotate, the rotating adjusting head 7 drives the first adjusting screw 5 and the second adjusting screw 6 to rotate. At this time, the two connecting blocks 402 will move in opposite directions on the screws, increasing the gap between the two connecting blocks 402. The adjusting ring 4 expands along the circumferential direction (the diameter increases), and the squeezing force of the adjusting ring 4 on the positioning plate 3 and the base 1 will also decrease. After the clamping force between the adjusting ring 4, the base, and the positioning plate 3 gradually disappears, the positioning plate 3 can rotate smoothly. Since the chuck 2 is fixedly connected to the positioning plate 3, the rotation of the chuck 2 can be controlled, and the workpiece will rotate accordingly.

[0041] As an optional implementation, the top surface of the base 1 is provided with an equally divided angle gradation line 102 along the circumferential direction; the outer side of the chuck 2 is provided with an indicator line 204, which is used to align with the angle gradation line 102 to indicate the rotation angle.

[0042] Figure 10 This is a top view of the rotary clamping self-centering tooling provided in this embodiment of the utility model. Figure 11 This is a side view of the rotary clamping self-centering tooling provided in this embodiment of the utility model. Figure 10 , Figure 11 As shown, the top surface of the base 1 has a ring of equally spaced angle markings 102 along the circumference, with each marking marking an angle. The outer surface of the chuck 2 has an indicator line 204. When the indicator line 204 aligns with a certain angle marking 102, it indicates that the workpiece has rotated by the angle corresponding to that angle marking 102. This method ensures precise control of the workpiece's rotation angle.

[0043] As an optional implementation, the bottom surface of the chuck 2 is provided with a plurality of first fixing holes 203; the positioning plate 3 is provided with a plurality of second fixing holes 301, and the plurality of second fixing holes 301 are provided in a one-to-one correspondence with the plurality of first fixing holes 203; one end of the fixing member 8 passes through the second fixing hole 301 and is connected to the corresponding first fixing hole 203.

[0044] like Figure 5 As shown, the bottom surface of the chuck 2 is provided with multiple first fixing holes 203, such as... Figure 6 As shown, the positioning disk 3 is provided with multiple second fixing holes 301, such as... Figure 9 As shown, the fastener 8 passes through the second fixing hole 301 and connects to the first fixing hole 203, thereby fixing the positioning plate 3 and the chuck 2 together.

[0045] As an optional implementation, the fastener 8 is a screw, and the fastener 8 is threadedly connected to the chuck 2.

[0046] As an optional implementation, the external threads of both the first adjusting screw 5 and the second adjusting screw 6 are trapezoidal threads.

[0047] As an optional implementation, the threaded holes 403 of the two connecting blocks 402 are left-hand trapezoidal threads and right-hand trapezoidal threads, respectively.

[0048] The threaded holes 403 of the two connecting blocks 402 are left-hand trapezoidal threads and right-hand trapezoidal threads, respectively. When the first adjusting screw 5 and the second adjusting screw 6 rotate, the two connecting blocks 402 will move simultaneously on the two adjusting screws in opposite directions (moving towards each other at the same time or moving away from each other at the same time).

[0049] As an optional implementation, the chuck 2 has an opening in the middle; the positioning disk 3 has a through hole in the middle, and a positioning ring 302 extends from the edge of the through hole. The positioning ring 302 can be inserted into the opening of the chuck 2, and the outer side of the positioning ring 302 contacts the inner side of the opening of the chuck 2.

[0050] like Figure 4 As shown, the chuck 2 has an opening in the middle, such as Figure 6 As shown, the positioning disk 3 has a through hole in the middle, and a positioning ring 302 extends upward from the edge of the through hole. The positioning ring 302 can be inserted into the middle opening of the chuck 2, so that the positioning ring 302 is coaxial with the chuck 2.

[0051] As an alternative implementation, the chuck 2 includes three clamping jaws 201.

[0052] like Figure 4 As shown, the chuck 2 has three clamping jaws 201 on its end face. The three clamping jaws 201 are evenly distributed on the end face, thereby improving the clamping stability of the workpiece.

[0053] As an optional implementation, the outer end face of the adjusting head 7 is provided with an internal hexagonal countersunk hole.

[0054] The adjusting head 7 is provided with an internal hexagon countersunk hole, which facilitates tool fixing and rotation of the adjusting head 7.

[0055] As an optional implementation, the receiving hole 101 is located on the outer side of the base 1 near the base 1 as a countersunk hole for receiving the adjusting head 7.

[0056] like Figure 1 As shown, the two receiving holes can accommodate part of the adjustment head, preventing the adjustment head from protruding too much from the side of the base.

[0057] The installation steps for the above tooling are as follows:

[0058] ① Place the inner conical surface of the adjusting ring onto the outer conical surface of the positioning plate, so that the conical surfaces of the two are in contact;

[0059] ② Attach the large opening of the base to the top end face of the adjusting ring;

[0060] ③ Pass the first adjusting screw and the second adjusting screw through the two receiving holes of the base respectively, and then pass them through the threaded holes of the two connecting blocks on the adjusting ring respectively through the threaded engagement. Then the first adjusting screw and the second adjusting screw are fixedly connected.

[0061] ④ Connect the ends of the first and second adjusting screws closest to the outer circle of the base to the adjusting heads respectively;

[0062] ⑤ Insert the stop step of the chuck into the small opening end of the base, rotate the chuck so that the second fixing hole of the positioning plate is coaxial with the first fixing hole of the chuck, pass the fastener through the second fixing hole of the positioning plate and screw it into the first fixing hole of the chuck to fix the two.

[0063] Workpiece usage steps:

[0064] ① Place the fixture on the machine tool worktable and use clamping plates, screws, and other fixtures to press the upper surface of the base to fix the fixture to the machine tool worktable;

[0065] ② The workpiece is clamped by the three clamping jaws of the chuck;

[0066] ③ According to the workpiece processing requirements, use the outer circle markings of the chuck and the angle markings of the base as the basis for the rotation angle, and rotate the chuck to the appropriate position after rotating it a certain angle;

[0067] ④ The rotating adjustment head drives the first and second adjustment screws to rotate, causing the two connecting blocks of the adjustment ring to move towards each other. At this time, the adjustment ring contracts inward along the circumference to press the base and positioning plate, thereby achieving the clamping and fixing of the chuck and the workpiece.

[0068] ⑤ After completing the machining, loosen the clamping jaws of the rotary chuck and put the workpiece down.

[0069] The above technical solution has the following beneficial effects: it can realize the rapid clamping and automatic centering of cylindrical workpieces; it can realize the rotation and positioning of the clamped workpiece around the axis at any angle; it can realize the rapid fastening, rapid rotation and rapid loosening of the workpiece, reducing the clamping and alignment time; it has a simple structure, is easy to manufacture and has strong versatility.

[0070] The above-described specific embodiments of the utility model further illustrate the purpose, technical solution, and beneficial effects of the utility model. It should be understood that the above content is only a specific embodiment of the utility model and is not intended to limit the scope of protection of the utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the utility model should be included within the scope of protection of the utility model.

Claims

1. A rotary clamping self-centering tooling, characterized in that, include: The base includes a large opening end and a small opening end, and two opposite receiving holes are provided on the side wall; The chuck has a protruding stop step on one side, which is located inside the small opening end of the base, and a clamping claw on the other side for clamping the tooling. A positioning disk, the outer side of which is a conical surface, is inserted into the base through the large opening end and connected to the chuck. The adjusting ring includes a ring body with an opening on one side and connecting blocks extending outward on both sides of the opening. The ring body is sleeved on the outside of the positioning disk, and its top surface contacts the inner end face of the small opening end of the base. The inner surface of the ring body is a conical surface and contacts the conical surface of the positioning disk. The two connecting blocks are respectively provided with two receiving holes of the base, and both connecting blocks are provided with threaded holes. One end of the first adjusting screw passes through a receiving hole and is threaded to the corresponding connecting block, while the other end is threaded to an adjusting head; one end of the second adjusting screw passes through another receiving hole and is threaded to the corresponding connecting block, while the other end is threaded to an adjusting head.

2. The rotary clamping self-centering fixture according to claim 1, characterized in that: The top surface of the base is provided with a ring of equally spaced angle lines along the circumference; The outer side of the chuck is provided with indicator lines, which are used to align with the angle markings to indicate the rotation angle.

3. The rotary clamping self-centering fixture according to claim 1, characterized in that: The bottom surface of the chuck is provided with a plurality of first fixing holes; The positioning disk is provided with a plurality of second fixing holes, and the plurality of second fixing holes are provided in a one-to-one correspondence with a plurality of first fixing holes; One end of the fastener passes through the second fixing hole and connects to the corresponding first fixing hole.

4. The rotary clamping self-centering fixture according to claim 1, characterized in that: Both the first adjusting screw and the second adjusting screw have trapezoidal threads on their external threads.

5. The rotary clamping self-centering fixture according to claim 4, characterized in that: The threaded holes of the two connecting blocks are left-hand trapezoidal threads and right-hand trapezoidal threads, respectively.

6. The rotary clamping self-centering fixture according to claim 1, characterized in that: The chuck has an opening in the middle; The positioning disk has a through hole in the middle, and a positioning ring extends from the edge of the through hole. The positioning ring can be inserted into the opening of the chuck, and the outer side of the positioning ring contacts the inner side of the opening of the chuck.

7. The rotary clamping self-centering fixture according to claim 1, characterized in that: The chuck includes three clamping jaws.

8. The rotary clamping self-centering fixture according to claim 1, characterized in that: The outer end face of the adjusting head is provided with an internal hexagonal countersunk hole.

9. The rotary clamping self-centering fixture according to claim 1, characterized in that: The receiving hole is a countersunk hole located near the outer side of the base, used to receive the adjusting head.

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