Drilling clamp
By adopting the coordinated design of positioning installation devices, compression devices and error-proof parts in the drilling fixture, the problem of preventing workpiece back-installation and accuracy influence is solved, and stable machining and accuracy protection are achieved.
Patent Information
- Application Number
- CN202420139666.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-19
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-01-19
AI Technical Summary
In the prior art, when preventing workpieces from being reversed, the error-proof device may cause scratches or wear on the mating surface, affecting the accuracy, and the processing methods and sizes of different workpieces are different, which can easily lead to machining errors.
A drilling fixture is designed, using positioning and mounting devices and compression devices, combining anti-error parts with blank surfaces and bumps of the workpiece, avoiding the impact of accuracy through anti-barrier gaps, and reducing the design of the rotating shaft and compression part. Force to avoid damage.
Effectively prevent workpieces from being reversed, avoid error-proof parts affecting workpiece accuracy, reduce the generation of bad products, and reduce damage to workpieces and improve processing stability.
Smart Images
Figure CN222221211U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of mechanical processing equipment and clamping and fixing devices, in particular to a drilling fixture. Background Art
[0002] Connecting rods are usually used to transmit power or connect two different parts in common power equipment (such as engines). When the connecting rod is assembled with an external structure, the end face and threaded hole on the connecting rod are usually used to connect with other structures. And according to different connection structures, different workpieces have different processing methods and processing dimensions at different positions. If the workpiece is reversed, it will cause errors in workpiece processing, which will lead to an increase in defective products.
[0003] In order to prevent the workpiece from being reversed, an error-proofing structure is usually set on the fixture. However, due to the accuracy requirements of the workpiece's blank surface and mating surface, the blank surface will have a certain probability of affecting the installation of the workpiece. When the error-proofing device is matched with the mating surface, the mutual force between the mating surface and the error-proofing device may cause scratches or wear on the mating surface, affecting the accuracy of the mating surface.
[0004] Therefore, it is urgent for those skilled in the art to provide a drilling fixture that can prevent the workpiece from being reversed while not affecting the accuracy of the workpiece. Summary of the invention
[0005] The technical problem to be solved by the utility model is to overcome the defects in the prior art, thereby providing a drilling fixture.
[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0007] A drilling fixture is used to clamp a workpiece to be drilled, including a positioning and mounting device and a clamping device; the workpiece has a first end face and a second end face arranged opposite to each other, the clamping device is located on the positioning and mounting device, and has the function of applying force to the second end face to push the first end face of the workpiece to a clamped state of the positioning and mounting device; it also includes an anti-error component arranged corresponding to the protrusion of the workpiece, the anti-error component is used to prevent the workpiece from being reversely installed; a blocking gap is provided between the side wall surface of the anti-error component and the blank surface of the workpiece.
[0008] Preferably, the positioning and mounting device comprises a suspension plate and positioning columns arranged in pairs on the suspension plate; the positioning columns are distributed in a linear array along the suspension plate in a plurality of pairs.
[0009] Preferably, there are several clamping devices, each of which includes two clamping parts arranged in pairs, and the clamping part located between two adjacent workpieces is installed on the same rotating shaft; the rotating shaft has the function of driving the two clamping parts to rotate along a direction parallel to the second end face so as to simultaneously clamp or simultaneously rotate away from the workpieces corresponding to the clamping parts.
[0010] Preferably, the pressing portion has a motion state of rotating in a direction perpendicular to the second end surface and pressing or disengaging from the second end surface.
[0011] Preferably, the pressing portion comprises a pressing block and a blocking piece; the blocking piece is detachably mounted on a side of the pressing block facing the second end surface.
[0012] Preferably, the baffle is configured as a copper sheet.
[0013] Preferably, the position where the clamping device abuts against the workpiece is located on the side of the workpiece where a hole is to be drilled.
[0014] Preferably, the positioning column includes a first positioning column and a second positioning column; the first positioning column is used to abut against the inner wall surface of the large hole of the workpiece, and a first gap is provided between at least a partial outer wall surface of the first positioning column and the inner wall surface of the large hole; the second positioning column is used to abut against the inner wall surface of the small hole of the workpiece, and a second gap is provided between at least a partial outer wall surface of the first positioning column and the inner wall surface of the small hole.
[0015] Compared with the prior art, the beneficial effects of the present invention are:
[0016] The drilling fixture provided in the above technical solution can prevent the workpiece from being installed incorrectly while avoiding the anti-error component affecting the connection accuracy of the mating surface of the workpiece through the cooperation between the anti-error component and the blank surface of the workpiece and the protrusion. In addition, a certain blocking gap is provided between the side wall surface of the anti-error component and the blank surface of the workpiece, so that the accuracy of the blank surface will not affect the effect of the anti-error component, that is, when the anti-error component is matched with different workpieces, the anti-error component will not affect the correct installation of the workpiece due to the influence of the accuracy of the blank surface. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0018] Figure 1 A structural diagram of one implementation method of the utility model
[0019] Figure 2 for Figure 1 Schematic diagram of the structure of the workpiece.
[0020] Figure 3 for Figure 2 Schematic diagram of the workpiece from another perspective.
[0021] Figure 4 for Figure 1 Schematic diagram of a partial cutaway view (front view).
[0022] Figure 5 for Figure 4 Enlarged view of position A in the middle.
[0023] Description of reference numerals:
[0024] 100, workpiece; 1001, first end face; 1002, second end face; 1003, bump; 1004, blank surface; 1005, large hole; 1006, small hole; 1, positioning and mounting device; 11, hanging plate; 12, positioning column; 121, first positioning column; 122, second positioning column; 2, clamping device; 20, clamping part; 201, pressing block; 202, baffle; 3, error-proofing component; 31, side wall surface; 4, anti-blocking gap; 5, rotating shaft; 6, first gap; 7, second gap. DETAILED DESCRIPTION
[0025] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0026] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0028] See also Figures 1 to 5 The embodiment of the utility model provides a drilling fixture for clamping a workpiece 100 to be drilled, comprising a positioning and mounting device 1 and a clamping device 2. The positioning and mounting device 1 is used to position and place the workpiece 100, and the clamping device 2 is used to cooperate with the positioning and mounting device 1 to press the workpiece 100 against the positioning and mounting device 1.
[0029] Specifically, see Figures 1 to 3 In this embodiment, the workpiece 100 has a first end face 1001 and a second end face 1002 that are relatively arranged. The clamping device 2 is located on the positioning and mounting device 1, and has a function of applying force to the second end face 1002 to push the first end face 1001 of the workpiece 100 to a clamped state against the positioning and mounting device 1, that is, when the workpiece 100 is fixed by a drilling fixture, the workpiece 100 is first placed on the positioning and mounting device 1 so that the first end face 1001 and the positioning and mounting device 1 are aligned, and then the second end face 1002 of the workpiece 100 is clamped by the clamping device 2 so that the workpiece 100 is stably placed on the positioning and mounting device 1.
[0030] Since the processing methods and dimensions of different positions of the workpiece 100 are different, if the workpiece 100 is reversely installed, that is, the second end surface 1002 is pressed against the positioning and mounting device 1, it may cause processing errors of the workpiece 100, thereby leading to an increase in defective products.
[0031] In order to prevent the workpiece 100 from turning over, in this embodiment, an anti-error component 3 is also included, and the anti-error component 3 is arranged corresponding to the protrusion 1003 of the workpiece 100, which is used to prevent the workpiece 100 from being reversely installed. Specifically, the protrusion 1003 extends from the second end face 1002 of the workpiece 100 to the first end face 1001, and is located on the blank surface 1004 on one side of the workpiece 100, and the setting positions of the anti-error component 3 and the protrusion 1003 are symmetrically arranged about the central axis of the workpiece 100, so that when the second end face 1002 is installed toward the positioning and installation device 1, the protrusion 1003 will be against the anti-error component 3, thereby limiting the placement of the workpiece 100.
[0032] Since the machining accuracy of the blank surface 1004 of the workpiece 100 is relatively low, in order to avoid interference between the blank surface 1004 and the anti-error component 3 due to machining errors, in the present embodiment, a blocking gap 4 is provided between the side wall surface 31 of the anti-error component 3 and the blank surface 1004 of the workpiece 100. The distance of the blocking gap 4 (i.e., the distance from the blank surface 1004 to the side wall surface 31) is greater than the allowable error of the blank surface 1004 in the design requirements of the workpiece 100, so that the accuracy of the blank surface 1004 will not affect the effect of the anti-error component 3.
[0033] See also Figure 1 , Figure 3 and Figure 4 In order to realize synchronous processing of multiple workpieces 100, in this embodiment, the positioning and installation device 1 includes a suspension plate 11 and positioning columns 12 arranged in pairs on the suspension plate 11, and the positioning columns 12 are distributed in a linear array along the suspension plate 11. It can be known that in order to realize synchronous processing of multiple workpieces 100, correspondingly, a plurality of clamping devices 2 are also provided.
[0034] Furthermore, in order to reduce the setting of driving structures (such as cylinders, etc.), in the present embodiment, each clamping device 2 includes two clamping parts 20, and the clamping part 20 located between two adjacent workpieces 100 is installed on the same rotating shaft 5, and each rotating shaft 5 is driven by a corresponding cylinder, so that when one cylinder drives the rotating shaft 5 to rotate, it can simultaneously drive the two clamping parts 20 to move, so as to drive the two clamping parts 20 to rotate parallel to the second end face 1002, and simultaneously clamp or simultaneously rotate away from the workpiece 100 corresponding to the clamping part 20.
[0035] Furthermore, in this embodiment, only one side of the workpiece 100 located at both ends of the positioning and mounting device 1 has a clamping portion 20, and the clamping portion 20 has a motion state of rotating in a direction perpendicular to the second end surface 1002 and clamping or disengaging from the second end surface 1002, thereby clamping the workpiece 100 in a top-down motion manner, which can reduce the force between it and the workpiece 100 and avoid damage to the second end surface 1002 of the workpiece 100. Thus, while reducing the driving structure, it can reduce damage to the workpiece 100 to a certain extent.
[0036] Furthermore, in this embodiment, among the plurality of workpieces 100, the workpiece 100 located in the middle is provided with a rotating shaft 5 on both sides, that is, the clamping parts 20 on both sides of the workpiece 100 are rotated to or away from the upper end of the second end surface 1002. During the rotation of the clamping part 20, if the two rotating shafts 5 move in different directions, the directions of the forces exerted by the two clamping parts 20 on the second end surface 1002 of the same workpiece 100 are the same, so that the workpiece 100 has a tendency to move in the direction of rotation of the clamping part 20, and the first positioning column 121 of the positioning column 12 is used to abut against the inner wall surface of the large hole 1005 of the workpiece 100, and the second positioning column 122 is used to abut against the inner wall surface of the small hole 1006 of the workpiece 100, which may easily cause damage to the inner walls of the large hole 1005 and the small hole 1006, thereby affecting the machining accuracy of the workpiece 100. Therefore, in this embodiment, the rotating shafts 5 located on both sides of the same workpiece 100 have the same rotation direction (rotating clockwise or counterclockwise at the same time).
[0037] Furthermore, in order to prevent the pressing block 201 from directly contacting the second end surface 1002 and causing the second end surface 1002 to have its precision reduced, in this embodiment, the pressing portion 20 includes a pressing block 201 and a baffle 202; the baffle 202 is detachably mounted on the side of the pressing block 201 facing the second end surface 1002, so that the pressing block 201 can be used to ensure the extrusion strength, and the baffle 202 can be used to prevent the second end surface 1002 from being damaged. Specifically, the baffle 202 is set as a copper sheet.
[0038] join Figure 1 and Figure 4 The position where the clamping device 2 abuts against the workpiece 100 is located on the side of the workpiece 100 where a hole is to be drilled, so as to ensure the stability of the workpiece 100 when processing the workpiece 100.
[0039] join Figure 4 In order to ensure the limiting effect while preventing the workpiece 100 from being difficult to remove from the positioning column 12, in this embodiment, a first gap 6 is provided between a local outer wall surface of the first positioning column 121 and an inner wall surface of the large hole 1005, and a second gap 7 is provided between a local outer wall surface of the first positioning column 121 and an inner wall surface of the small hole 1006.
[0040] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.
Claims
1. A drilling fixture for clamping a workpiece (100) to be drilled, characterized in that: It comprises a positioning and mounting device (1) and a pressing device (2); The workpiece (100) has a first end face (1001) and a second end face (1002) arranged opposite to each other, the pressing device (2) is located on the positioning and mounting device (1) and has a function of applying force to the second end face (1002) to push the first end face (1001) of the workpiece (100) against the positioning and mounting device (1) to achieve a pressing state; It also includes an anti-error component (3) arranged corresponding to the protrusion (1003) of the workpiece (100), wherein the anti-error component (3) is used to prevent the workpiece (100) from being reversely installed; A blocking gap (4) is provided between the side wall surface (31) of the error-proofing component (3) and the blank surface (1004) of the workpiece (100).
2. A drilling fixture according to claim 1, characterized in that: The positioning and mounting device (1) comprises a hanging plate (11) and positioning columns (12) arranged in pairs on the hanging plate (11); The positioning columns (12) are distributed in a linear array along the suspension plate (11) in a plurality of pairs.
3. A drilling fixture according to claim 2, characterized in that: A plurality of the clamping devices (2) are provided, each of the clamping devices (2) comprises two clamping parts (20) arranged in pairs, and the clamping parts (20) located between two adjacent workpieces (100) are installed on the same rotating shaft (5); The rotating shaft (5) has an operating state of driving the two clamping parts (20) to rotate in parallel with the second end surface (1002) so as to simultaneously clamp or simultaneously rotate away from the workpiece (100) corresponding to the clamping parts (20).
4. A drilling fixture according to claim 3, characterized in that: The pressing portion (20) has a motion state of rotating in a direction perpendicular to the second end surface (1002) and pressing or disengaging from the second end surface (1002).
5. A drilling fixture according to claim 3 or 4, characterized in that: The pressing portion (20) comprises a pressing block (201) and a blocking piece (202); The blocking piece (202) is detachably mounted on a side of the pressing block (201) facing the second end surface (1002).
6. A drilling fixture according to claim 5, characterized in that: The baffle (202) is configured as a copper sheet.
7. A drilling fixture according to claim 1, characterized in that: The position where the clamping device (2) abuts against the workpiece (100) is located on one side of the position of the workpiece (100) to be drilled.
8. A drilling fixture according to claim 2, characterized in that: The positioning column (12) comprises a first positioning column (121) and a second positioning column (122); The first positioning column (121) is used to abut against the inner wall surface of the large hole (1005) of the workpiece (100), and a first gap (6) is provided between at least a part of the outer wall surface of the first positioning column (121) and the inner wall surface of the large hole (1005); The second positioning column (122) is used to abut against the inner wall surface of the small hole (1006) of the workpiece (100), and a second gap (7) is provided between at least a partial outer wall surface of the first positioning column (121) and the inner wall surface of the small hole (1006).