Rotatable compression type double-sided machining fixture

Abstract

This utility model discloses a rotatable clamping double-sided machining fixture, relating to the technical field of machining fixtures for mechanical workpieces. This utility model aims to solve the problem of existing tooling requiring secondary clamping, which affects coaxiality and production efficiency. The utility model includes a base plate, a main plate, and a secondary plate. The main plate is mounted on the base plate, and a bearing is mounted on the main plate. A rotating shaft is mounted at the center of the secondary plate, and the outer wall of the rotating shaft is assembled and connected to the inner ring of the bearing. The secondary plate is provided with several locating pins and fixing bolts. Workpieces are mounted on the locating pins, and several pressure plates are mounted on adjacent workpieces. Several second pin holes are opened diagonally on the secondary plate, and several first pin holes are opened on the main plate. Fixing pins are installed on the inner walls of the first and second pin holes. This utility model avoids the accumulation of errors from multiple clamping operations, effectively ensuring the coaxiality, parallelism, and other dimensional and positional accuracy of the workpiece during double-sided machining, and improving the pass rate of high-precision parts machining.

Description

Technical Field

[0001] This utility model relates to the technical field of mechanical workpiece processing fixtures, specifically a rotatable clamping double-sided processing fixture. Background Technology

[0002] In the machining industry, for workpieces requiring double-sided machining (such as machining holes on both ends), the clamping process has a significant impact on machining accuracy and production efficiency. Traditional machining methods often have significant drawbacks: firstly, multiple clamping operations are required to machine different surfaces, and these operations can lead to accumulated positioning errors, making it difficult to guarantee the coaxiality, parallelism, and other geometric tolerances of the workpiece. This is especially true for high-precision parts, where deviations from secondary clamping can severely affect subsequent assembly and performance. Secondly, the clamping process is cumbersome, requiring readjustment and workpiece fixation each time, consuming considerable time, reducing production efficiency, and failing to meet the high-efficiency, precision production pace of modern machining.

[0003] Existing tooling fixtures also have shortcomings in positioning accuracy, ease of clamping, and versatility. Some fixtures have poorly designed locating pins, resulting in large clearances between the fixture and the workpiece, or uneven distribution of clamping force on the pressure plate, leading to slight workpiece displacement during machining. Furthermore, frequent fixture changes or structural adjustments are required for different workpieces, increasing production costs and operational difficulty. Therefore, developing a tooling fixture that can achieve double-sided machining in a single clamping operation, ensure machining accuracy, and simplify the clamping process has become an urgent problem to be solved in the field of machining. Utility Model Content

[0004] To address the aforementioned problems, i.e., the issues raised in the background art, this utility model proposes a rotatable clamping double-sided machining fixture, comprising a base plate, a main plate, and a secondary plate. The main plate is mounted on the base plate, and a bearing is mounted on the main plate. A rotating shaft is mounted at the center of the secondary plate, and the outer wall of the rotating shaft is assembled and connected to the inner ring of the bearing. The secondary plate is provided with several locating pins and fixing bolts. Workpieces are mounted on the locating pins, and several pressure plates are mounted on adjacent workpieces. Several second pin holes are formed diagonally on the secondary plate, and several first pin holes are formed on the main plate. Fixing pins are installed on the inner walls of the first and second pin holes.

[0005] A further feature of this invention is that both the main board and the sub-board have several bolt holes with the same diameter and corresponding positions. Each bolt hole contains a movable bolt, which is locked in place by a nut.

[0006] A further feature of this invention is that the thickness of the protrusion of the positioning pin is less than or equal to the wall thickness of the workpiece.

[0007] A further feature of this invention is that several of the pressure plates pass through fixing bolts, and the other end of each fixing bolt is locked in place by a nut.

[0008] A further feature of this invention is that several of the first pin holes and the second pin holes have the same diameter and their positions correspond to each other.

[0009] The beneficial technical effects of this utility model are as follows: This utility model uses a positioning pin to accurately position the workpiece, and the thickness of its protrusion is adapted to the workpiece wall thickness to ensure that the pressure plate and the workpiece are in close contact; the direction of the sub-plate is fixed by a double structure of fixed pin and movable bolt, which suppresses the displacement of the sub-plate during processing, avoids the accumulation of errors from multiple clamping, effectively ensures the coaxiality, parallelism and other dimensional and positional accuracy of the workpiece double-sided processing, reduces the dependence of operation on personnel experience, reduces errors, and improves the pass rate of high-precision parts processing. Attached Figure Description

[0010] Figure 1 A three-dimensional structural schematic diagram of the present invention is shown.

[0011] Figure 2 The front view of this utility model is shown.

[0012] Figure 3 A schematic diagram of the motherboard structure is shown.

[0013] Figure 4 A schematic diagram of the sub-plate structure is shown.

[0014] Figure 5 A schematic diagram of the workpiece structure is shown.

[0015] Attached reference numerals: 1. Base plate, 2. Main plate, 3. Sub-plate, 4. Nut, 5. Pressure plate, 6. Bearing, 7. Shaft, 8. Workpiece, 9. Locating pin, 10. Fixing pin, 11. First pin hole, 12. Second pin hole, 13. Bolt hole, 14. Fixing bolt. Detailed Implementation

[0016] The following is a reference to the appendix. Figure 1-5 The preferred embodiments of this utility model are described below. Those skilled in the art should understand that these embodiments are merely for explaining the technical principles of this utility model and are not intended to limit the scope of protection of this utility model.

[0017] This utility model proposes a rotatable clamping double-sided machining fixture, including a base plate 1, a main plate 2, and a secondary plate 3. The base plate 1 supports the entire fixture, and the main plate 2 is mounted on the base plate 1, providing a mounting base for components such as the secondary plate 3. A bearing 6 is mounted on the main plate 2, and a rotating shaft 7 is mounted at the center of the secondary plate 3. The outer wall of the rotating shaft 7 is assembled and connected to the inner ring of the bearing 6, enabling the secondary plate 3 to rotate, facilitating the machining of different sides of the workpiece 8.

[0018] The sub-plate 3 is equipped with several locating pins 9 and fixing bolts 14. The locating pins 9 are used to determine the clamping position of the workpiece 8. The workpiece 8 is mounted on the locating pins 9, and several pressure plates 5 are mounted on adjacent workpieces 8. The pressure plates 5 are used to press and fix the workpiece 8. The thickness of the protrusion of the locating pin 9 is less than or equal to the wall thickness of the workpiece 8, which not only accurately positions the workpiece 8, but also ensures that the pressure plates 5 fit well with the workpiece 8 and press tightly, reducing positioning errors from the clamping source. The pressure plates 5 all pass through the fixing bolts 14, and the other end of the fixing bolts 14 is locked by nuts 4.

[0019] The sub-plate 3 has several second pin holes 12 diagonally, and the main plate 2 has several first pin holes 11. A fixing pin 10 is installed on the inner wall of each of the first pin holes 11 and second pin holes 12. The fixing pin 10 is used to fix the orientation of the sub-plate 3. The diameters of the first pin holes 11 and second pin holes 12 are the same, and their positions correspond to each other to facilitate the insertion of the fixing pin 10.

[0020] Both the main board 2 and the sub-board 3 have several bolt holes 13 with the same diameter and corresponding positions. Each bolt hole 13 contains a movable bolt, which is locked in place by a nut 4 to further reinforce the orientation of the sub-board 3.

[0021] By utilizing the first pin hole 11, the second pin hole 12 and the fixed pin 10, as well as the secondary reinforcement of the bolt holes 13, movable bolts and nuts 4 on the main plate 2 and the sub-plate 3, the sub-plate 3 is fixed from two dimensions, ensuring the stability of the sub-plate 3 and the workpiece 8 during the processing. This greatly reduces the processing deviation caused by unstable clamping and positional changes, effectively ensuring the coaxiality, parallelism and other dimensional and positional accuracy of the workpiece 8 during double-sided processing, and meeting the processing requirements of high-precision parts.

[0022] Working principle:

[0023] First, the workpiece 8 is clamped in position by the corresponding positioning pin 9. Then, the pressure plate 5 is installed on the fixing bolt 14 and locked with the nut 4. The pressure plate 5 and the workpiece 8 are pressed together on the auxiliary plate 3.

[0024] After all workpieces 8 are clamped, insert the fixing pin 10 into the inner cavity of the first pin hole 11 and the second pin hole 12 reserved on the main plate 2 and the sub-plate 3. After fixing the direction of the sub-plate 3, insert the movable bolt into the bolt hole 13 from the rear side of the main plate 2, and use the nut 4 to lock the other end of the movable bolt for secondary fixing of the direction of the sub-plate 3.

[0025] First, clamp the workpiece 8 in a flat-jaw vise. Then, install the flat-jaw vise on a vertical machining center. After one end face of the workpiece 8 is machined by the machining center, remove the movable bolt and the fixing pin 10. Rotate the sub-plate 3 180° and repeat the above steps of installing the movable bolt and the fixing pin 10. After fixing the direction of the sub-plate 3, machine the other end face of the workpiece 8 to complete the machining of the holes at both ends of the workpiece 8, and obtain the machined workpiece 8.

[0026] Although the present invention has been described with reference to preferred embodiments, various modifications can be made to it and components can be replaced with equivalents without departing from the scope of the present invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0027] In the description of this utility model, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to those processes, articles, or apparatus / devices.

[0030] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A rotatable clamping double-sided machining fixture, comprising a base plate (1), a main plate (2), and a secondary plate (3), wherein the main plate (2) is mounted on the base plate (1), characterized in that: The main board (2) is equipped with a bearing (6), and the center of the sub-board (3) is equipped with a rotating shaft (7). The outer wall of the rotating shaft (7) is connected to the inner ring of the bearing (6). The sub-plate (3) is provided with a number of positioning pins (9) and fixing bolts (14). The positioning pins (9) are equipped with workpieces (8), and the adjacent workpieces (8) are equipped with a number of pressure plates (5). The sub-plate (3) has several second pin holes (12) diagonally, and the main plate (2) has several first pin holes (11). The inner walls of the several first pin holes (11) and second pin holes (12) are all fitted with fixing pins (10).

2. The rotatable clamping double-sided machining fixture according to claim 1, characterized in that: Both the main board (2) and the sub-board (3) have several bolt holes (13) with the same diameter and corresponding positions. Each bolt hole (13) is equipped with a movable bolt, which is locked by a nut (4).

3. The rotatable clamping double-sided machining fixture according to claim 1, characterized in that: The thickness of the protrusion of the positioning pin (9) is less than or equal to the wall thickness of the workpiece (8).

4. The rotatable clamping double-sided machining fixture according to claim 1, characterized in that: Several of the pressure plates (5) pass through the fixing bolts (14), and the other end of the fixing bolts (14) is locked by nuts (4).

5. A rotatable clamping double-sided machining fixture according to claim 1, characterized in that: Several of the first pin holes (11) and the second pin holes (12) have the same diameter and their positions correspond to each other.

Images