Adjustable clamp

Abstract

The utility model relates to the technical field of workpiece clamping, and provides an adjustable clamp which comprises a 3R base and an adjusting seat, one end of the 3R base is hinged to the adjusting seat, an adjusting bolt in threaded connection with the adjusting seat is arranged on the vertical end face of the 3R base, an adjusting disc is arranged on the adjusting bolt in a sleeved mode, a spring abutting against the adjusting disc is limited in the adjusting seat, and the adjusting disc is connected with the adjusting seat in a sleeved mode. The included angle between the 3R base and the adjusting seat is changed by rotating the adjusting bolt, the 3R base is hinged to the adjusting seat, the adjusting bolt is in linkage fit with the spring, angle fine adjustment in the horizontal plane of the 3R base is achieved by rotating the adjusting bolt through thread transmission, and operation is easy and convenient.

Description

Technical Field

[0001] This utility model relates to the field of workpiece clamping technology, and more specifically, to an adjustable clamp. Background Technology

[0002] In the field of machining, the performance of workpiece clamping fixtures directly determines machining quality and production efficiency. With the increasing demand for high-precision machining, higher requirements are placed on the positioning accuracy, rigidity, and adaptability of fixtures. Especially in high-end manufacturing fields such as aerospace and precision molds, even minute positional deviations after workpiece clamping can lead to machining errors. Therefore, fixtures not only need reliable clamping force but also the ability to perform multi-degree-of-freedom fine adjustments to compensate for assembly errors on the machine tool table or workpiece reference surface.

[0003] Currently, traditional clamping fixtures mainly consist of a fixture body and a fixture actuator, fixing the workpiece through clamping. Their design focuses on static leveling in the horizontal plane. For example, while common vise-type fixtures or modular combination fixtures can achieve coarse leveling in the horizontal plane through guide rails or slides, the bottom of the fixture is usually rigidly connected to the machine tool table directly by bolts, lacking the function of fine-tuning angles in the horizontal plane. When there is a reference deviation in the workpiece blank, traditional fixtures are difficult to compensate for through their own structure, requiring auxiliary means such as setting shims between the fixture and the workpiece or manual grinding. This is not only inefficient but also prone to introducing secondary errors. Utility Model Content

[0004] The purpose of this invention is to provide an adjustable clamp that solves the problem that existing clamps cannot achieve fine-tuning of angles in the horizontal plane.

[0005] This utility model is achieved through the following technical solution: an adjustable clamp, including a 3R base and an adjusting seat, one end of the 3R base is hinged to the adjusting seat, an adjusting bolt is provided on the vertical end face of the 3R base and threadedly connected to the adjusting seat, an adjusting disc is sleeved on the adjusting bolt, and a spring that abuts against the adjusting disc is limited inside the adjusting seat. The included angle between the 3R base and the adjusting seat is changed by rotating the adjusting bolt.

[0006] Furthermore, the adjusting bolts include coarse adjusting bolts and fine adjusting bolts. The coarse adjusting bolts are located on the end face near the hinge side, and the fine adjusting bolts are located on the end face away from the hinge side.

[0007] Furthermore, the 3R base has a through hole for the adjusting bolt rod to pass through, and an adjustment gap is provided between the through hole and the adjusting bolt rod.

[0008] Furthermore, the 3R base is fitted with alignment bolts that are threaded into the adjustment seat for calibrating the 3R base and the adjustment seat to be flush.

[0009] Furthermore, a connecting seat is provided between the 3R base and the adjusting seat. One end of the connecting seat is bolted to the 3R base, and the other end of the connecting seat is rotatably connected to the adjusting seat through a rotating shaft.

[0010] Furthermore, the adjusting seat has a stepped hole, the small diameter section of which is threadedly connected to the adjusting bolt, and the stepped surface of the stepped hole abuts against the spring.

[0011] Furthermore, a wedge block is inserted between the 3R base and the adjustment seat.

[0012] Furthermore, the adjusting seat has mounting holes for connection with the machine tool.

[0013] This utility model has at least the following advantages and beneficial effects:

[0014] (1) By hinged to the 3R base and the adjusting seat, and by the linkage between the adjusting bolt and the spring, the angle of the 3R base in the horizontal plane can be finely adjusted by rotating the adjusting bolt through the thread transmission. The operation is simple and convenient.

[0015] (2) By setting a coarse adjustment bolt on the end face of the 3R base near the hinge side, the target angle can be quickly approached, and a fine adjustment bolt can be set on the end face of the 3R base away from the hinge side for fine correction, reducing the time for repeated adjustments and improving the adjustment efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an adjustable clamp provided by this utility model.

[0017] Figure 2 The front view of an adjustable clamp provided by this utility model.

[0018] Figure 3 A top view of an adjustable clamp provided by this utility model.

[0019] Figure 4 This utility model Figure 2 A partial sectional view along the AA direction.

[0020] Figure 5 This utility model Figure 2 Sectional view along the BB direction.

[0021] Reference numerals: 1-3R base, 10-through hole, 2-connecting seat, 3-adjusting seat, 30-stepped hole, 4-adjusting bolt, 41-coarse adjustment bolt, 42-fine adjustment bolt, 5-alignment bolt. Detailed Implementation

[0022] The specific implementation method is described below with reference to the accompanying drawings.

[0023] Example

[0024] like Figures 1 to 5 As shown, this embodiment mainly discloses an adjustable fixture, whose main structure includes a 3R base 1 and an adjusting seat 3. One end of the 3R base 1 is hinged to the adjusting seat 3. An adjusting bolt 4, which is threadedly connected to the adjusting seat 3, is provided on the vertical end face of the 3R base 1. An adjusting disc is sleeved on the adjusting bolt 4. A spring that abuts against the adjusting disc is limited inside the adjusting seat 3. The included angle between the 3R base 1 and the adjusting seat 3 is changed by rotating the adjusting bolt 4. Specifically, the 3R base 1 is a standardized and modular reference platform. Through a unified interface design, it realizes rapid and high-precision positioning and clamping between the workpiece, the fixture, and the machine tool. The adjusting seat 3 has an L-shaped horizontal projection and has mounting holes for connecting to the machine tool. It is connected to the machine tool by bolts, while the 3R base 1 is partially enclosed in the L-shaped adjusting seat 3 and slidably connected to the machine tool. Through the hinge between the 3R base 1 and the adjusting seat 3, and the linkage between the adjusting bolt 4 and the spring, the angle of the 3R base 1 in the horizontal plane can be finely adjusted. It should be noted that the spring is always under compression during use, and its elastic preload can counteract the influence of machining vibrations on the angle. Simultaneously, the adjusting bolt 4 and the adjusting seat 3 are rigidly and securely connected by threads, preventing stripping and allowing precise displacement control of the adjusting bolt 4 via threaded transmission. Furthermore, an indexing plate can be installed at the end of the adjusting bolt 4, and corresponding angle indicator lines can be marked on the 3R base 1 to achieve quantitative control of the adjustment process and improve operational efficiency.

[0025] Furthermore, in specific implementations, the adjusting bolt 4 provided in this embodiment of the present invention includes a coarse adjusting bolt 41 and a fine adjusting bolt 42. The coarse adjusting bolt 41 is located on the end face near the hinge side, and the fine adjusting bolt 42 is located on the end face away from the hinge side. Specifically, for the stability of adjustment, multiple coarse adjusting bolts 41 and fine adjusting bolts 42 can be vertically arranged. It should be noted that when the pitch of the coarse adjusting bolt 41 and the fine adjusting bolt 42 is the same, since the coarse adjusting bolt 41 is closer to the hinge axis, the coarse adjusting bolt 41 adjusts to a larger angle when rotating by the same angle. To avoid angle deviation that may occur due to improper coordination between the coarse and fine adjusting bolts 42, during operation, the coarse adjusting bolt 41 is adjusted first to quickly adjust to a position close to the target angle, and then the fine adjusting bolt 42 is further adjusted (for example, if it is necessary to adjust the rotation of the 3R base 1 by 3.5°, the coarse adjusting bolt 41 can be rotated first to rotate the 3R base 1 by 4°, and then the fine adjusting bolt 42 can be rotated back by 0.5°). The coarse adjustment stage quickly approaches the target angle, while the fine adjustment stage makes precise corrections, reducing the time spent on repeated adjustments and improving adjustment efficiency.

[0026] Furthermore, in a specific implementation, the 3R base 1 provided in this embodiment of the present invention has a through hole 10 for the rod of the adjusting bolt 4 to pass through, and an adjustment gap is provided between the through hole 10 and the rod of the adjusting bolt 4. Specifically, the adjustment gap allows the adjusting bolt 4 to deflect within a certain range, and the adjustment range covers both coarse and fine adjustment needs, ensuring that the angle between the 3R base 1 and the adjusting seat 3 can be finely adjusted.

[0027] Furthermore, in a specific implementation, the 3R base 1 provided in this embodiment of the present invention is fitted with a alignment bolt 5 that is threadedly connected to the adjusting seat 3 for calibrating the 3R base 1 and the adjusting seat 3 to be flush. Specifically, the alignment bolt 5 provides initial position calibration. Only when the 3R base 1 and the adjusting seat 3 are parallel can the alignment bolt 5 be smoothly passed through the 3R base 1 and threadedly connected to the adjusting seat 3, ensuring that the fixture can quickly return to the reference state after multiple adjustments.

[0028] Furthermore, in a specific implementation, a connecting seat 2 is provided between the 3R base 1 and the adjusting seat 3 provided in this embodiment of the invention. One end of the connecting seat 2 is bolted to the 3R base 1, and the other end of the connecting seat 2 is rotatably connected to the adjusting seat 3 via a rotating shaft. The connecting seat 2 and the 3R base 1 are bolted together, facilitating disassembly, maintenance, or replacement with bases of different specifications. It should be noted that there should be a gap between the connecting seat 2 and the adjusting seat 3 to avoid rotational interference.

[0029] Furthermore, in a specific implementation, the adjusting seat 3 provided in this embodiment of the present invention has a stepped hole 30. The small-diameter section of the stepped hole 30 is threadedly connected to the adjusting bolt 4, and the stepped surface of the stepped hole 30 abuts against the spring. Simultaneously, the large-diameter section of the stepped hole 30 contacts the spring, limiting the radial displacement of the spring and preventing uneven preload caused by spring misalignment. It should be noted that during adjustment, the threaded connection between the adjusting bolt 4 and the threaded hole of the small-diameter section should always maintain a stable connection force to ensure effective connection. In addition, when rotating the adjusting bolt 4 causes the 3R base 1 to rotate in the opposite direction, the adjusting disc can abut against the adjusting seat, preventing excessive compression of the spring.

[0030] Furthermore, in a specific implementation, a wedge block is inserted between the 3R base 1 and the adjusting seat 3 provided in this embodiment of the invention. The wedge block eliminates gaps through the self-locking principle of the inclined plane and is used to lock after adjustment, further preventing vibration during processing from causing the spring to compress and wobble, thus improving stability during processing. At the same time, in order to prevent the wedge block from slipping due to processing vibration, anti-slip textures are added to the surface of the wedge block, or it is fixed by magnetic adsorption.

Claims

1. An adjustable clamp, characterized in that, It includes a 3R base (1) and an adjusting seat (3). One end of the 3R base (1) is hinged to the adjusting seat (3). The vertical end face of the 3R base (1) is provided with an adjusting bolt (4) that is threadedly connected to the adjusting seat (3). An adjusting disc is sleeved on the adjusting bolt (4). A spring that abuts against the adjusting disc is limited inside the adjusting seat (3). The included angle between the 3R base (1) and the adjusting seat (3) is changed by rotating the adjusting bolt (4).

2. The adjustable clamp according to claim 1, characterized in that, The adjusting bolt (4) includes a coarse adjusting bolt (41) and a fine adjusting bolt (42). The coarse adjusting bolt (41) is located on the end face near the hinge side, and the fine adjusting bolt (42) is located on the end face away from the hinge side.

3. An adjustable clamp according to claim 1, characterized in that, The 3R base (1) has a through hole (10) for passing through the rod of the adjusting bolt (4), and an adjustment gap is provided between the through hole (10) and the rod of the adjusting bolt (4).

4. An adjustable clamp according to claim 1, characterized in that, The 3R base (1) is fitted with an alignment bolt (5) that is threaded to the adjustment seat (3) for calibrating the 3R base (1) and the adjustment seat (3) to be flush.

5. An adjustable clamp according to claim 1, characterized in that, A connecting seat (2) is provided between the 3R base (1) and the adjusting seat (3). One end of the connecting seat (2) is bolted to the 3R base (1), and the other end of the connecting seat (2) is rotatably connected to the adjusting seat (3) through a rotating shaft.

6. An adjustable clamp according to claim 1, characterized in that, The adjusting seat (3) has a stepped hole (30), the small diameter section of the stepped hole (30) is threadedly connected to the adjusting bolt (4), and the stepped surface of the stepped hole (30) abuts against the spring.

7. An adjustable clamp according to claim 1, characterized in that, A wedge block is inserted between the 3R base (1) and the adjustment seat (3).

8. An adjustable clamp according to claim 1, characterized in that, The adjusting seat (3) has mounting holes for connecting to the machine tool.

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