Centering clamp and part machining equipment
By adopting a combined structure of a limiting plate, guide, positioning member, double-headed screw and pushing member in the centering fixture, the problems of complex structure and high cost of centering fixtures in the prior art are solved, and the arc is achieved The stable clamping and centering of the workpiece improves the accuracy and efficiency of processing.
Patent Information
- Application Number
- CN202420899923.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-28
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-04-28
AI Technical Summary
When processing arc workpieces, existing centering fixtures have complex structures and high cost, and cannot provide stable guidance, resulting in inaccurate clamping and affecting the processing effect.
A centering fixture including a limiting plate, a guide member, a positioning member, a double-head screw and a pushing member is designed. The pushing member is driven to move in the axial direction through the rotation of the double-head screw, and the positioning member is pushed to move in the guide cavity. , cooperate with the limiting plate to achieve clamping and centering of the workpiece.
It realizes stable clamping and centering of arc workpieces, improves processing accuracy and efficiency, and reduces structural complexity and production costs.
Smart Images
Figure CN222134227U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of parts processing, in particular to a centering fixture. In addition, the utility model also relates to a parts processing equipment comprising the centering fixture. Background Art
[0002] In the field of parts processing technology, it is necessary to clamp and position arc workpieces or workpieces with arc surfaces. For example, Chinese Patent Publication No. CN209551164U discloses a fixture for clamping arc products. This fixture ensures a complete fit with the arc product and provides high clamping stability, avoiding product deformation caused by the fixture not fully fitting the product. However, its structure is relatively complex, resulting in high manufacturing costs. Furthermore, it lacks stable guidance for the moving clamping parts, making it unable to accurately center the workpiece to be processed. Therefore, an improved centering fixture is needed. Utility Model Content
[0003] One purpose of the utility model is to provide a centering fixture.
[0004] Another object of the present utility model is to provide a parts processing equipment including the centering fixture.
[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is:
[0006] A centering fixture is used to clamp and center a workpiece having an arc surface. The centering fixture comprises:
[0007] A clamping body, on which a limit plate is provided;
[0008] The guide member and the positioning member are symmetrically arranged on the clamp body and form a guide cavity. The positioning member is movably arranged in the guide cavity. A clamping cavity is formed between the positioning member and the limit plate. The clamping cavity is used to clamp the workpiece. The positioning member is used to fit and abut the arc surface of the workpiece.
[0009] A double-headed screw and a pusher, the double-headed screw is arranged in the guide cavity and is coaxial with the center line of the clamping body. There are two pushers, and the two pushers are respectively sleeved on the threaded sections at both ends of the double-headed screw. The double-headed screw is used to be driven to rotate and drive the pusher to move axially along the double-headed screw through the thread when rotating. The pusher is used to push the positioning piece to move along the guide cavity so that the positioning piece cooperates with the limit plate to clamp the workpiece and limit it.
[0010] In one or more embodiments of the centering clamp, the guide cavity is arranged along the radial direction of the double-headed screw, and a first inclined surface is symmetrically provided on the side where the positioning member abuts against the pushing member, and a second inclined surface is provided on the side where the pushing member abuts against the positioning member. The second inclined surface abuts against the first inclined surface and is used to push the positioning member to move radially along the double-headed screw when the pushing member moves axially along the double-headed screw.
[0011] In one or more embodiments of the centering fixture, a side of the positioning member that contacts the workpiece is provided with symmetrical arc surface segments, and the arc surface segments are adapted to the circular arc surface of the workpiece.
[0012] In one or more embodiments of the centering fixture, one end or both ends of the double-headed screw are passed through the guide member on one side or both sides.
[0013] In one or more embodiments of the centering fixture, the thread segments at both ends of the double-start screw have opposite thread rotation directions.
[0014] In one or more embodiments of the centering clamp, the clamp body is a plate-shaped structure, and two limiting plates are symmetrically arranged on the clamp body, and the two limiting plates are respectively arranged on both sides of the guide cavity.
[0015] Furthermore, the positioning members are symmetrically arranged in the guide cavity, the pusher is a wedge-shaped structure or a cone structure with symmetrical conical surfaces, and the conical surfaces on opposite sides of the pusher abut against the preset inclined surfaces on the two positioning members in a one-to-one correspondence.
[0016] In one or more embodiments of the centering clamp, the clamp body includes a plurality of limit plates, which are arranged in sequence at angles along the circumference and together form a polygonal frame structure. The centering clamp includes a plurality of guide member groups, which are arranged one-to-one corresponding to the plurality of limit plates. A single guide member group includes two guide members which are arranged on opposite sides of the corresponding limit plate and are both perpendicular to the limit plate. A guide cavity is formed between the two guide members in the single guide member group.
[0017] Furthermore, each guide cavity is movably provided with a positioning piece, and the pusher is provided with a plurality of conical surfaces along its circumference, and the plurality of conical surfaces on the pusher abut against the preset inclined surfaces on the plurality of positioning pieces in a one-to-one correspondence.
[0018] According to another aspect of the present invention, a parts processing device is provided, which includes the above-mentioned centering fixture.
[0019] The utility model has the following beneficial effects:
[0020] The centering clamp of the utility model can drive two symmetrical pushers to move relative to each other along the axial direction of the double-headed screw by rotating the double-headed screw. While the pushers are moving, they can also push the positioning member to move along the guide cavity and cooperate with the limit plate of the clamping body to clamp the workpiece. Since the double-headed screw and the center line of the clamping body are coaxial, the pushers are symmetrically arranged at both ends of the double-headed screw, and the guide member forms a guide cavity to guide the displacement of the positioning member. Therefore, the symmetrical movement of the left and right pushers can push the positioning member to move smoothly in a straight line in a direction perpendicular to the center line of the clamping body. The positioning member fits and abuts the arc surface of the workpiece, thereby clamping the workpiece and playing a centering role for the workpiece.
[0021] The parts processing equipment of the present invention also has the above-mentioned beneficial effects.
[0022] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above. In addition to the purposes, features, and advantages described above, the present invention has other purposes, features, and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:
[0024] Figure 1 This is a schematic diagram of the overall structure of a preferred embodiment of the utility model;
[0025] Figure 2 It is an enlarged schematic diagram of point I of the preferred embodiment of the present utility model.
[0026] Legend: 1. Clamping body; 2. Workpiece; 3. Pusher; 4. Double-headed screw; 5. Positioning part; 6. Guide part. DETAILED DESCRIPTION
[0027] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in a variety of different ways as defined and covered below.
[0028] Please refer to the attached drawing, which is a structural diagram of a preferred embodiment of a centering fixture and parts processing equipment provided by the present invention.
[0029] A centering fixture is used to clamp and center a workpiece 2 having an arc surface. The centering fixture includes:
[0030] A clamping body 1, on which a limit plate is provided;
[0031] The guide member 6 and the positioning member 5 are symmetrically arranged on the clamp body 1 and form a guide cavity. The positioning member 5 is movably arranged in the guide cavity. A clamping cavity is formed between the positioning member 5 and the limit plate. The clamping cavity is used to clamp the workpiece 2. The positioning member 5 is used to fit and abut the arc surface of the workpiece 2.
[0032] The double-headed screw 4 and the pusher 3 are arranged in the guide cavity and the double-headed screw 4 is coaxial with the center line of the clamping body 1. There are two pushers 3, and the two pushers 3 are respectively sleeved on the threaded sections at both ends of the double-headed screw 4. The double-headed screw 4 is used to be driven to rotate and drive the pusher 3 to move axially along the double-headed screw 4 through the thread when rotating. The pusher 3 is used to push the positioning member 5 to move along the guide cavity so that the positioning member 5 cooperates with the limit plate to clamp the workpiece 2 and limit it.
[0033] Here, the “clamp body 1 ” means a structure that provides an installation boundary for various components. In some embodiments, the clamp body 1 is a plate-like structure or a frame structure.
[0034] The present invention can drive two symmetrical pushers 3 to move relative to each other along the axial direction of the double-headed screw 4 by rotating the double-headed screw 4. While moving, the pushers 3 can push the positioning member 5 to move along the guide cavity and cooperate with the limit plate of the clamp body 1 to clamp the workpiece 2. Since the double-headed screw 4 is coaxial with the center line of the clamp body 1, the pushers 3 are symmetrically arranged at both ends of the double-headed screw 4, and the guide member 6 forms a guide cavity that can guide the displacement of the positioning member 5. Therefore, the symmetrical movement of the left and right pushers 3 can push the positioning member 5 to move smoothly in a straight line in a direction perpendicular to the center line of the clamp body 1, and the positioning member 5 is in contact with the arc surface of the workpiece 2, thereby clamping the workpiece 2 and centering the workpiece 2.
[0035] Preferably, please refer to Figure 1 As shown, the guide cavity is arranged along the radial direction of the double-headed screw 4, and the side where the positioning member 5 abuts against the pushing member 3 is symmetrically provided with a first inclined surface, and the side where the pushing member 3 abuts against the positioning member 5 is set as a second inclined surface, and the second inclined surface abuts against the first inclined surface and is used to push the positioning member 5 to move radially along the double-headed screw 4 when the pushing member 3 moves axially along the double-headed screw 4.
[0036] It can be understood that, since there are corresponding inclined surfaces between the pusher 3 and the positioning member 5, when the pusher 3 moves along the axial direction of the double-headed screw 4, Figure 1 The pusher 3 can push the positioning member 5 toward the limit plate, thereby clamping and fixing the workpiece 2. The pusher 3 and the positioning member 5 are in contact with each other through the inclined surface, which can also reduce the friction loss between the pusher 3 and the positioning member 5.
[0037] Of course, the present invention does not rule out the possibility of installing wheels or rollers on the inclined surfaces of the pusher 3 or the positioning member 5, which can further reduce the friction between the pusher 3 and the positioning member 5 and optimize the structure to make it more streamlined.
[0038] Preferably, please refer to Figure 1 and Figure 2 As shown, a side of the positioning member 5 that contacts the workpiece 2 is provided with symmetrical arc surface segments, which are adapted to the arc surface of the workpiece 2 .
[0039] It can be understood that the two symmetrical arc surface segments on the positioning member 5 can abut against the arc surface of the workpiece 2, and the symmetrical arc surface segments can abut and limit the left and right sides of the workpiece 2, thereby improving the stability of the support for the arc surface of the workpiece 2, ensuring the centering effect of the workpiece 2, and achieving a more stable and accurate centering effect.
[0040] Preferably, please refer to Figure 1 As shown, one end or both ends of the double-headed screw 4 are passed through the guide member 6 on one side or both sides.
[0041] It is understandable that the double-headed screw 4 is installed through the guide member 6, which can reduce additional installation components, help streamline the overall structure, and reduce manufacturing and maintenance costs.
[0042] Optionally, a handle is provided at one end of the double-headed screw 4 passing through the guide member 6 to facilitate manual rotation of the double-headed screw 4.
[0043] Preferably, please refer to Figure 1 As shown, the thread segments at both ends of the double-start screw 4 have opposite thread rotation directions.
[0044] It can be understood that the two pushers 3 are respectively sleeved on the thread segments at both ends of the double-headed screw 4, and the pushers 3 are symmetrically arranged, and the thread segments at both ends of the double-headed screw 4 have opposite rotation directions. When the double-headed screw 4 is rotated, the pushers 3 on both sides can be driven to move relative to each other. Figure 1 That is, simultaneously move the positioning member 5 toward both ends of the double-headed screw 4 to push the positioning member 5 toward the limit plate to clamp the workpiece 2, or simultaneously move the positioning member 5 and the workpiece 2 toward the center point of the double-headed screw 4 to release the positioning member 5.
[0045] In one embodiment, the clamp body 1 is a plate-shaped structure, and two limiting plates are symmetrically arranged on the clamp body 1, and the two limiting plates are respectively arranged on both sides of the guide cavity.
[0046] It should be noted that limiting plates are provided on both sides of the guide cavity, and the positioning member 5 in the guide cavity can be easily taken out and placed on either side of the guide cavity. The positioning member 5 can then form a clamping cavity with the limiting plates on either side, thereby enabling the workpiece 2 to be clamped in the clamping cavity at different positions, making it convenient to adjust the position of the workpiece 2 and facilitate subsequent processing of different positions of the workpiece 2.
[0047] Preferably, the positioning members 5 are symmetrically arranged in the guide cavity, the pusher 3 is a wedge-shaped structure or a cone structure with symmetrical conical surfaces, and the conical surfaces on opposite sides of the pusher 3 abut against the preset inclined surfaces on the two positioning members 5 in a one-to-one correspondence.
[0048] It is understandable that in production, multiple workpieces 2 may need to be clamped and processed at once to improve processing efficiency. Therefore, in this embodiment, symmetrical limit plates are provided on the plate-shaped clamp body 1, and correspondingly, symmetrical positioning members 5 are provided in the guide cavity. The two pushers 3 can simultaneously push the positioning members 5 on both sides, and the positioning members 5 on both sides can simultaneously clamp two workpieces 2, thereby increasing the number of clamped workpieces 2 and improving processing efficiency.
[0049] In another embodiment, the clamp body 1 includes a plurality of limit plates, which are arranged in sequence at angles along the circumference and together form a polygonal frame structure. The centering clamp includes a plurality of guide member groups, which are arranged one-to-one corresponding to the plurality of limit plates. A single guide member group includes two guide members 6 which are arranged on opposite sides of the corresponding limit plate and are both perpendicular to the limit plate. A guide cavity is formed between the two guide members 6 in the single guide member group.
[0050] It should be noted that the clamping body 1 in this embodiment is a frame structure, and the guide cavity in the clamping body 1 can be understood as a circular array radiating along the center line of the clamping body 1. In this way, a positioning member 5 can be set in any guide cavity, and a clamping cavity is formed by the positioning member 5 and any limit plate, so that the workpiece 2 can be clamped in more different positions, which is convenient for adjusting the position of the workpiece 2 and facilitating subsequent processing of different positions of the workpiece 2.
[0051] Preferably, each guide cavity is movably provided with a positioning member 5 , and the pusher 3 is provided with a plurality of conical surfaces along its circumference, and the plurality of conical surfaces on the pusher 3 abut against the preset inclined surfaces on the plurality of positioning members 5 in a one-to-one correspondence.
[0052] It should be noted that the "pushing member 3" here can be understood as a multi-faceted diamond-shaped pyramid structure.
[0053] It can be understood that in order to further improve the processing efficiency and meet the clamping requirements of more than two workpieces 2, this embodiment sets the clamping body 1 as a frame structure, and each side of the clamping body 1 is set as a limit plate. The groups of guide members 6 are arranged in a circular array to form a multi-directional guide cavity, and then the positioning members 5 in each guide cavity are pushed to move by the pushing member 3. In conjunction with the limit plate, multiple workpieces 2 can be clamped and positioned at the same time, which can greatly improve the processing efficiency.
[0054] According to another aspect of the present invention, a parts processing device is provided, which includes the above-mentioned centering fixture.
[0055] The parts processing equipment of the present invention also has the above-mentioned beneficial effects.
[0056] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements that are inherent to such process, method, article or apparatus.
[0057] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. The above is only a preferred implementation method of the present invention. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of the present invention, they can make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without improvement, should be regarded as protection of the present utility model.
Claims
1. A centering fixture for clamping and centering a workpiece (2) having an arc surface, characterized in that: Centering fixture includes: A clamping body (1), on which a limiting plate is arranged; A guide member (6) and a positioning member (5), wherein the guide member (6) is symmetrically arranged on the clamp body (1) and forms a guide cavity, the positioning member (5) is movably arranged in the guide cavity, a clamping cavity is formed between the positioning member (5) and the limiting plate, the clamping cavity is used to clamp the workpiece (2), and the positioning member (5) is used to fit and abut against the arc surface of the workpiece (2); A double-headed screw (4) and a pusher (3), wherein the double-headed screw (4) is arranged in a guide cavity and is coaxial with the center line of the clamp body (1), and two pushers (3) are provided, and the two pushers (3) are respectively sleeved on the threaded sections at both ends of the double-headed screw (4), and the double-headed screw (4) is used to be driven to rotate and drive the pusher (3) to move axially along the double-headed screw (4) through the thread when rotating, and the pusher (3) is used to push the positioning member (5) to move along the guide cavity, so that the positioning member (5) cooperates with the limiting plate to clamp and limit the workpiece (2).
2. A centering fixture according to claim 1, characterized in that: The guide cavity is arranged along the radial direction of the double-headed screw (4); a first inclined surface is symmetrically arranged on a side where the positioning member (5) abuts against the pushing member (3); a second inclined surface is arranged on a side where the pushing member (3) abuts against the positioning member (5); the second inclined surface abuts against the first inclined surface and is used to push the positioning member (5) to move radially along the double-headed screw (4) when the pushing member (3) moves axially along the double-headed screw (4).
3. A centering fixture according to claim 1, characterized in that: A symmetrical arc surface segment is provided on one side of the positioning member (5) that abuts against the workpiece (2), and the arc surface segment is matched with the circular arc surface of the workpiece (2).
4. A centering fixture according to claim 1, characterized in that: One end or both ends of the double-headed screw (4) are inserted into the guide member (6) on one side or both sides.
5. A centering fixture according to claim 1, characterized in that: The thread sections at both ends of the double-headed screw (4) have opposite thread rotation directions.
6. A centering fixture according to claim 1, characterized in that: The clamp body (1) is a plate-shaped structure, and two limit plates are symmetrically arranged on the clamp body (1), and the two limit plates are respectively arranged on both sides of the guide cavity.
7. A centering fixture according to claim 6, characterized in that: The positioning member (5) is symmetrically arranged in the guide cavity, the pushing member (3) is a wedge-shaped structure or a cone structure with symmetrical cone surfaces, and the cone surfaces on the opposite sides of the pushing member (3) are in one-to-one contact with the preset inclined surfaces on the two positioning members (5).
8. A centering fixture according to claim 1, characterized in that: The clamp body (1) comprises a plurality of limit plates, which are arranged in sequence at an angle along the circumferential direction and together enclose a polygonal frame structure. The centering clamp comprises a plurality of guide member groups, which are arranged in one-to-one correspondence with the plurality of limit plates. A single guide member group comprises two guide members (6) which are arranged on opposite sides of the corresponding limit plate and are perpendicular to the limit plate. A guide cavity is formed between the two guide members (6) in the single guide member group.
9. A centering fixture according to claim 8, characterized in that: Each guide cavity is movably provided with a positioning piece (5), and the push piece (3) is provided with a plurality of conical surfaces along its circumference, and the plurality of conical surfaces on the push piece (3) abut against the preset inclined surfaces on the plurality of positioning pieces (5) in a one-to-one correspondence.
10. A parts processing equipment, characterized in that: Comprising a centering fixture as described in any one of claims 1-9.