Adjustable clamping and fixing tool for small part machining
By designing adjustable clamping fixtures, the problems of low clamping efficiency, high cost and insufficient machining accuracy caused by differences in external contours in the machining of small parts of wind turbine gearboxes were solved, achieving efficient and precise parts machining and machine tool capacity utilization.
Patent Information
- Application Number
- CN202422728170.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-09
- Publication Date
- 2025-09-09
- Estimated Expiration
- 2034-11-09
AI Technical Summary
In the existing technology, the processing tooling of small parts of wind turbine gearboxes requires the production of multiple equal-height blocks and pressure plates due to the large differences in their outer contour dimensions. This results in low clamping efficiency and high cost, as well as uneven clamping force and easy deformation. The machine tool capacity is underutilized and tool interference occurs frequently.
The adjustable clamping fixture is used to achieve transverse clamping of the workpiece through right L-shaped and left L-shaped fixtures, push rod fixture screws and bolts and other components, which can adapt to the processing of parts within different external dimensions and avoid uneven force and tool interference caused by pressing the pressure plate.
This eliminates the need for frequent tooling changes, reduces workpiece deformation, improves machining accuracy and efficiency, avoids tool interference, reduces costs, and improves machine tool utilization.
Smart Images
Figure CN223313534U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of wind power gear boxes, in particular to an adjustable clamping and fixing tool for processing small parts. Background Art
[0002] Some tooling for machining small parts in wind turbine gearboxes is placed directly on the machine table, and contour blocks and pressure plates must be pre-fabricated based on the parts' outline dimensions. Because the outline dimensions of small parts in wind turbine gearboxes vary greatly, it's impossible to use the same contour blocks and pressure plates for clamping and securing them. For parts like cover plates with significantly different outlines, a variety of contour blocks and pressure plates must be fabricated, which not only reduces clamping efficiency but also significantly increases tooling costs.
[0003] Technical solution of prior art 1:
[0004] According to the outline dimensions of the small parts on the wind turbine gearbox provided by the designers, equal height blocks are made in advance to support the lower plane of the cover parts. Since the T-slots on the machine tool workbench are spaced far apart, when encountering small structural parts, they can only be fixed with a longer tooling pressure plate.
[0005] Disadvantages of the prior art 1:
[0006] 1. When encountering small parts with very different outline dimensions, it is necessary to manufacture various height blocks and pressure plates of different lengths, which results in high tooling costs.
[0007] 2. When thin-walled parts are pressed by a pressure plate, the pressure of the pressure plate may be inconsistent, which may easily lead to uneven force on the workpiece and deformation. For small parts with high flatness requirements, the processing accuracy of the parts cannot be effectively guaranteed.
[0008] 3. To process small parts of different sizes, it is necessary to switch back and forth between the height blocks and the pressure plate, which results in a long waiting time for the machine tool and the machine tool's production capacity cannot be fully utilized.
[0009] 4. Use the pressure plate to press the top of small parts to clamp and fix them. If there is a place that needs to be processed in the clamping area, the pressure plate may interfere with the tool of the machine tool, making it impossible to process. Utility Model Content
[0010] The utility model provides an adjustable clamping and fixing tool for processing small parts, which aims to solve the shortcomings of the prior art, has a simple structure, strong versatility, improves the processing quality of parts, and avoids tool interference.
[0011] The technical solution adopted by the utility model to solve its technical problems is:
[0012] An adjustable clamping fixture for processing small parts, characterized by:
[0013] The right L-shaped tooling and the left L-shaped tooling are respectively fixed on the integral base;
[0014] The fixing bolts pass through and are fixed on the left L-shaped fixture;
[0015] The push rod tooling screw is threaded and passes through the central threaded hole of the fixing tooling bolt. The tooling base is provided with a second-step through hole. A bolt passes through the second-step through hole and is screwed into the threaded hole at the end of the push rod tooling screw. The bolt head of the bolt is stuck in the large-diameter hole on the right side of the second-step through hole. The bolt fixes the tooling base and the push rod tooling screw.
[0016] The tooling base is placed on the integral base;
[0017] The workpiece is clamped between the fixture base and the right L-shaped fixture.
[0018] The right pad and the right L-shaped tooling are fixedly connected by screws passing through corresponding threaded holes opened on their respective sides; the left pad and the tooling base are fixedly connected by screws passing through corresponding threaded holes opened on their respective sides; the workpiece is clamped between the right pad and the left pad.
[0019] A round nut is welded to the left end of the push rod tooling screw, and the wrench tooling screw is threadedly passed through the round nut.
[0020] An anti-loosening round nut is screwed on both ends of the push rod tooling screw.
[0021] The fixing tooling bolt is threaded and passes through the threaded through hole of the left L-shaped tooling. The flange is installed on the fixing tooling bolt. The round nut is threaded on the part of the tooling bolt with an external thread. The round nut presses the flange to fix the fixing tooling bolt and the left L-shaped tooling.
[0022] The utility model is beneficial in that:
[0023] 1) There is no need to switch tooling back and forth when processing small parts with different outlines. Only the tooling in the present invention is needed to achieve the processing requirements of small parts within a certain size range;
[0024] 2) By using this fixture to clamp small parts horizontally, the chance of workpiece deformation caused by uneven force applied to the workpiece due to inconsistent pressure from the pressure plate can be reduced. Furthermore, the cover plate no longer needs to be clamped by a pressure plate, preventing interference with the machine tool. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0026] Figure 1 This is a cross-sectional view of the tooling of the utility model for clamping and fixing a small workpiece;
[0027] Figure 2 for Figure 1 A-direction view in. DETAILED DESCRIPTION
[0028] In order to more clearly illustrate the technical solution of the present invention, the following will briefly introduce the drawings required for the description. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other embodiments can be obtained based on these drawings without inventive work. In order to facilitate understanding of the present invention, the following will be described in more detail with reference to the drawings and specific embodiments.
[0029] It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more elements can be present in between. When an element is described as being "connected" to another element, it can be directly connected to the other element, or one or more elements can be present in between. The terms "upper", "lower", "inner", "outer", "bottom", etc. used in this specification indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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", "third", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.
[0030] like Figure 1 、 Figure 2 As shown:
[0031] The right L-shaped tooling 2 is placed on the integral base 1 and fixed by welding.
[0032] Two threaded holes are pre-cut on the side of the right L-shaped fixture 2, and two threaded holes are pre-cut on the side of the right pad 3. The right pad 3 and the right L-shaped fixture 2 are assembled and fixed by two symmetrically distributed screws 4. The right pad 3 is mainly used to prevent the workpiece from slipping when clamping and fixing.
[0033] The left L-shaped fixture 5 is placed on the integral base 1 and secured by welding. A threaded through-hole is pre-cut in the center of the left L-shaped fixture 5. A customized fixing fixture bolt 6 is screwed through the pre-cut threaded through-hole in the left L-shaped fixture 5. After installation, the flange 7 is fitted over the threaded portion of the fixing fixture bolt 6. The round nut 8 is then screwed onto the threaded portion of the fixing fixture bolt 6. The round nut 8 compresses the flange 7, securing the fixing fixture bolt 6 and the left L-shaped fixture 5.
[0034] The threaded end of the push rod fixture screw 9 is passed through the fixing fixture bolt 6. The fixing fixture bolt 6 is a bolt with a central threaded hole. The external thread of the fixing fixture bolt 6 is connected to the left L-shaped fixture 5, and the internal thread of the fixing fixture bolt 6 is matched with the external thread of the push rod fixture screw 9. A through hole is pre-opened in the fixture base 12. The bolt 15 is passed through the pre-opened through hole on the left side of the fixture base 12 and tightened into the threaded hole 91 at the end of the push rod fixture screw 9. The through hole 121 is a second-stage through hole. The bolt head of the bolt 15 is stuck in the large-diameter hole on the right side of the second-stage through hole. By tightening the bolt 15, the fixture base 12 and the push rod fixture screw 9 are fixed.
[0035] A round nut 29 is welded to the other end of the push rod tooling screw 9. The wrench manual mounting screw 11 is threaded through the round nut 29. The wrench manual mounting screw 11 is perpendicular to the push rod tooling screw 9 and can be used as the lever of the wrench to facilitate the movement of the push rod tooling screw 9. An anti-loosening round nut 10 is tightened on both sides of the round nut 29 to prevent the wrench manual mounting screw 11 from falling off the round nut 29.
[0036] The tooling base 12 is placed on the integral base 1 and is not fixed to the integral base 1. Two threaded holes are pre-cut on the right side of the tooling base 12, and two threaded holes are pre-cut on the side of the left pad 13. The left pad 13 and the tooling base 12 are assembled and fixed by two symmetrically distributed screws 14. The left pad 13 is mainly used to prevent the workpiece from slipping when clamping and fixing it.
[0037] After placing the workpiece 16 on the support block 17, the push rod tooling screw 9 is driven to rotate by turning the wrench tooling screw 11. Since the left L-shaped tooling 5 and the integral base 1 are fixed, the fixing tooling bolt 6 and the left L-shaped tooling 5 are also fixed by threaded connection, while the tooling base 12 and the integral base 1 are not fixed.
[0038] The internal thread of the fixing tool bolt 6 is connected with the external thread of the push rod tool screw 9, so the rotation of the push rod tool screw 9 causes the tool bolt 9 to move to the right, pushing the tool base 12 to move to the right, thereby clamping the workpiece 16, and the workpiece 16 is clamped between the right pad 3 and the left pad 13.
[0039] When the rotation of the push rod tooling screw 9 causes the tooling bolt 9 to move leftward, the bolt 15 can drive the tooling base 12 to move leftward, thereby achieving the loosening of the workpiece 16.
[0040] For small workpieces 16 of different sizes, it is only necessary to turn the wrench to manually install the screw rod 11 to drive the movement of the tooling base 12.
[0041] Existing tooling for machining cover plate parts is placed directly on the machine table for processing, and requires pre-fabrication of contour blocks and pressure plates based on the part's outline dimensions. Due to the significant variation in outline dimensions of the small parts used in wind turbine gearboxes, it's impossible to use a single contour block and pressure plate for clamping and securing them. For small parts with significantly varying outlines, a variety of contour blocks and pressure plates must be manufactured, which not only reduces clamping efficiency but also significantly increases tooling costs.
[0042] When using a pressure plate to press small parts, the pressure may not be consistent, which may cause uneven force on the workpiece and deformation. For small parts with high processing requirements, the processing accuracy of the parts cannot be effectively guaranteed. When using a pressure plate to press the top of small parts to fix them, if there is a place that needs to be processed on the pressing part, the pressure plate may interfere with the tool of the machine tool, resulting in processing failure.
[0043] This new tooling can be used to process small parts with a certain range of contours, without the need to switch tooling back and forth. Furthermore, the new tooling directly clamps small parts through the clamping modules on both sides, effectively reducing workpiece deformation and improving part processing accuracy. Furthermore, the top of the workpiece is clamped by a pressure plate, so if there is a need for processing on the top of the cover, it can be processed at any time without the risk of interference with the machine tool's cutting tool.
[0044] The advantages of this utility model tooling are:
[0045] 1. Simple structure, easy to process and manufacture;
[0046] 2. It has strong versatility and can be applied to the processing of small parts within a certain range, saving costs;
[0047] 3. Fix the workpiece by horizontal clamping to reduce the risk of workpiece deformation and improve the processing quality of parts;
[0048] 4. The traditional pressing plate method is no longer used to fix small parts. When the part plane has processing requirements, the machine tool's tool will not interfere and can be processed at any time.
[0049] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other. The above description of the disclosed embodiments enables professionals and technicians in this field to implement or use the utility model. Various modifications to these embodiments will be obvious to professionals and technicians in this field. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. An adjustable clamping fixture for small parts processing, characterized by: The right L-shaped tooling and the left L-shaped tooling are respectively fixed on the integral base; the fixing tooling bolt passes through and is fixed to the left L-shaped tooling; the push rod tooling screw is screwed in conjunction with and passes through the central threaded hole of the fixing tooling bolt, and a second-step through hole is provided in the tooling base, and a bolt passes through the second-step through hole and is screwed into the threaded hole at the end of the push rod tooling screw, and the bolt head of the bolt is stuck in the large-diameter hole on the right side of the second-step through hole. The bolt fixes the tooling base and the push rod tooling screw; the tooling base is placed on the integral base; the workpiece is clamped between the tooling base and the right L-shaped tooling.
2. The adjustable clamping fixture for small parts processing according to claim 1, characterized in that: The right pad and the right L-shaped tooling are fixedly connected by screws passing through corresponding threaded holes opened on their respective sides; the left pad and the tooling base are fixedly connected by screws passing through corresponding threaded holes opened on their respective sides; the workpiece is clamped between the right pad and the left pad.
3. The adjustable clamping fixture for small parts processing according to claim 1, characterized in that: A round nut is welded to the left end of the push rod tooling screw, and the wrench tooling screw is threadedly passed through the round nut.
4. The adjustable clamping fixture for small parts processing according to claim 1, characterized in that: An anti-loosening round nut is screwed on both ends of the push rod tooling screw.
5. The adjustable clamping fixture for small parts processing according to claim 1, characterized in that: The fixing tooling bolt is threaded and passes through the threaded through hole of the left L-shaped tooling. The flange is installed on the fixing tooling bolt. The round nut is threaded on the part of the tooling bolt with an external thread. The round nut presses the flange to fix the fixing tooling bolt and the left L-shaped tooling.