Fixing tool for keyway of longitudinal processing of bar

Abstract

The utility model discloses a fixed frock of bar longitudinal processing keyway belongs to frock clamp technical field, and this frock includes base, fixed assembly and clamp assembly, and the base is opened with the recess for accommodating bar, sliding slot and second hole. The fixed assembly includes bolt, U groove lower pressing plate and the limiting post fixed in the lower pressing plate bottom, the bolt is screwed on the base and its lower end abuts on U groove lower pressing plate, the limiting post is slidably matched in the second hole, the clamp assembly includes slide rail and pin, the slide rail is slidably arranged in the sliding slot, and is opened with first hole, and the pin is plug -in and plug -out and is arranged in U groove lower pressing plate and first hole. The utility model discloses the quick dismounting of slide rail through the pin, solves the problem of replacing the clamp complex, improves the versatility, and through the limiting post orientation simultaneously, makes bolt lower pressing stable and reliable, guarantees the machining accuracy.

Description

Technical Field

[0001] This utility model relates to the field of tooling and fixture technology, and in particular to a fixing tool for longitudinal machining of keyways in bar stock. Background Technology

[0002] Bar stock is a common basic material in mechanical manufacturing. When performing subsequent processing on bar stock, especially when milling longitudinal keyways, it is necessary to use fixtures to firmly clamp it on the machine tool table. The primary purpose of this clamping is to prevent the bar stock from shifting or vibrating due to cutting forces during processing, so as to ensure processing accuracy and safety.

[0003] However, in actual production, there are many types of bars that need to be processed, and they vary in diameter and shape (such as round, square, and hexagonal). This places high demands on the versatility of the fixed tooling.

[0004] Traditional fixed tooling, such as dedicated V-blocks or vises, typically has a fixed clamping surface in order to achieve clamping stability and structural simplicity. This type of tooling is often only suitable for bars of specific sizes or shapes. When it is necessary to process bars of different specifications, a lot of time must be spent changing the entire tooling, resulting in excessive auxiliary time and low production efficiency.

[0005] To address these issues, some so-called adjustable universal clamps have emerged. However, these clamps, in order to achieve versatility, often have complex structures, including multiple bolts, pressure plates, and pads that require simultaneous adjustment. When changing to bars of different specifications, operators need to spend a significant amount of time on tedious disassembly, reassembly, or fine-tuning, which is not only inefficient but also can introduce instability due to the complex adjustment mechanism, making it difficult to guarantee clamping rigidity comparable to dedicated tooling. Therefore, existing technologies generally suffer from the problems of complex structures, low replacement efficiency, and difficulty in simultaneously achieving clamping stability.

[0006] Therefore, this utility model proposes a fixing fixture for longitudinally machining keyways on bar stock to address the shortcomings of the prior art. Utility Model Content

[0007] To overcome the above shortcomings, this utility model provides a fixing fixture for longitudinal machining of keyways in bar stock, aiming to improve the problems of existing fixing fixtures for bar stock machining, such as complex structure, low efficiency, and insufficient clamping stability when changing fixtures.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: a fixing fixture for longitudinally machining keyways on bar stock, comprising: a base, wherein the base has a groove, a slide, and a second hole for accommodating the bar stock; a fixing assembly, wherein the fixing assembly includes a bolt, a U-groove lower pressure plate, and a limiting post fixedly connected to the bottom of the U-groove lower pressure plate; and a clamping assembly, wherein the clamping assembly includes a slide rail and a pin, the bolt is threadedly connected to the base and its lower end abuts against the upper surface of the U-groove lower pressure plate, the limiting post is slidably fitted in the second hole, the slide rail is slidably disposed in the slide groove, the slide rail has a first hole, and the pin is insertably and detachably inserted through the U-groove lower pressure plate and the first hole, so as to realize the detachable connection between the clamping assembly and the fixing assembly.

[0009] Preferably, the clamping assembly further includes a slotted plate and a limiting plate fixedly connected to the side wall of the slide rail, wherein the limiting plate is slidably connected within the slotted plate.

[0010] Preferably, the hollow slot plate is fixedly connected to the base.

[0011] Preferably, an anti-slip plate is fixedly connected to one side of the inner wall of the groove of the base.

[0012] Preferably, the working surface of the anti-slip plate is a knurled surface or coated with a high-friction material layer.

[0013] Preferably, the bottom surface of the slide rail is provided with a V-shaped groove.

[0014] Preferably, the groove of the base is a V-shaped groove structure, and is provided corresponding to the V-shaped groove of the slide rail.

[0015] Preferably, the U-groove lower pressure plate has a through hole for the pin to pass through.

[0016] This utility model has the following beneficial effects: 1. This utility model solves the problem in the prior art that when processing bars of different specifications, it is necessary to change the entire set of tooling or the adjustment process is complicated and time-consuming by setting a sliding slide rail and using pins to detachably connect the slide rail and the pressing component. It achieves the effect of quickly changing the fixture, improving the versatility of the tooling and production efficiency.

[0017] 2. This utility model solves the problem of insufficient clamping force or unstable pressing process of existing fixtures, which easily leads to loosening or vibration of the bar during processing, by adopting a bolt-driven pressing component and setting a guide structure with a limit post and a hole sliding fit. It achieves the effects of reliable clamping, high processing stability and guaranteed processing accuracy. Attached Figure Description

[0018] Figure 1This is a perspective view of the fixture for fixing the longitudinal machining of keyways on a bar stock proposed in this utility model. Figure 2 This is a schematic diagram of the base sidewall structure of the fixing fixture for longitudinal machining of keyways on bars proposed in this utility model; Figure 3 This is a schematic diagram of the bottom structure of the base of the fixing fixture for longitudinal machining of keyways on bars proposed in this utility model. Figure 4 This is an exploded view of the fixing component of the fixture for fixing the longitudinal machining keyway of the bar stock proposed in this utility model. Figure 5 This is an exploded view of the fixture assembly for fixing the longitudinal machining keyway of the bar stock proposed in this utility model.

[0019] Legend: 1. Base; 2. Clamp assembly; 201. Pin; 202. Hollow slot plate; 203. Limiting plate; 204. Slide rail; 205. Slide groove; 206. First hole; 3. Fixing assembly; 301. Bolt; 302. U-groove lower pressure plate; 303. Limiting post; 304. Second hole; 4. Anti-slip plate. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Reference Figures 1-5 The present invention provides an embodiment of a fixture for longitudinally machining keyways on bar stock, comprising a base 1, a fixing component 3 and a clamping component 2 mounted on the base 1. The base 1 serves as the mounting base for the entire fixture and supports the bar stock to be machined. The fixing component 3 applies a stable downward pressure to the bar stock placed on the base 1 to achieve fixation. The clamping component 2 directly clamps the bar stock and can be quickly replaced to accommodate bar stock of different specifications. Specifically, the base 1 has a groove for accommodating the bar, a slide 205, and a second hole 304. An anti-slip plate 4 is fixedly connected to the inner wall of one side of the groove. The structure of the fixing assembly 3 includes a bolt 301, a U-groove lower pressure plate 302, and a limiting post 303. The base 1 has a threaded hole, and the bolt 301 is threaded into the threaded hole of the base 1. The lower end of the bolt 301 abuts against the upper surface of the U-groove lower pressure plate 302. The limiting post 303 is fixedly connected to the bottom of the U-groove lower pressure plate 302. The limiting post 303 slides with the second hole 304 on the base 1, thereby providing guidance for the vertical lifting and lowering movement of the U-groove lower pressure plate 302. The structure of the clamping assembly 2 includes a slide rail 204 and a pin 201. The slide rail 204 is slidably disposed on the base 1. The slide rail 204 has a first hole 206 in the slide groove 205 and a corresponding through hole for the pin (201) to pass through on the U-groove pressure plate 302. The pin 201 is inserted and removed sequentially through the through hole of the U-groove pressure plate 302 and the first hole 206 of the slide rail 204. By inserting and removing the pin 201, the clamp assembly 2 and the fixing assembly 3 can be detached, thereby realizing the quick replacement of the slide rail 204. In order to further enhance the sliding stability of the slide rail 204, the clamp assembly 2 also includes a hollow groove plate 202 and a limiting plate 203. The hollow groove plate 202 is fixedly connected to the base (1), and the limiting plate 203 is fixedly connected to the side wall of the slide rail 204. The limiting plate 203 is slidably connected to the inside of the hollow groove plate 202. The bottom of the slide rail 204 is slidably fitted into the slide groove 205 at the top of the base 1, while the top of the slide rail 204 is in contact with the bottom surface of the U-groove pressure plate 302. A first hole 206 is provided through the main body of the slide rail 204. Correspondingly, a through hole for the pin (201) to pass through is also provided on the U-groove pressure plate 302. When it is necessary to fix the clamp assembly 2 and the fixing assembly 3, the slide rail 204 is pushed into the slide groove 205 and the first hole 206 is aligned with the through hole of the U-groove pressure plate 302. Then, the pin 201 is inserted and passes through the through hole and the first hole 206 of the U-groove pressure plate 302. The outer wall of the pin 201 contacts the inner wall of the two holes at the same time, thereby locking the slide rail 204 and the U-groove pressure plate 302 together. When the slide rail 204 needs to be replaced, simply pull the pin 201 out of the first hole 206 and the through hole of the U-groove pressure plate 302. After the pin 201 is released from its limit, the slide rail 204 can be pulled out smoothly along the direction of the slide groove 205, thus completing the disassembly. To install a new model of slide rail 204, the opposite steps are performed, which simplifies the operation and enables quick replacement of the fixture. Meanwhile, in order to ensure the stability and guiding accuracy of the slide rail 204 during the sliding replacement process, the clamp assembly 2 also includes a slotted plate 202 and a limiting plate 203. The slotted plate 202 is fixedly connected to the base (1), and the limiting plate 203 is fixedly connected to the side wall of the slide rail 204. In the assembled state, the limiting plate 203 slides and fits inside the slotted plate 202. This structure provides lateral support and guidance for the pulling and pushing process of the slide rail 204, ensuring the smoothness and accuracy of the replacement operation. To enhance the axial restraint of the bar stock and prevent slippage during longitudinal machining, please refer to... Figure 1 An anti-slip plate 4 is fixedly connected to the inner wall of one side of the groove of the base 1. In order to further increase the friction, the working surface of the anti-slip plate 4 can be set as a knurled surface or coated with a high friction material layer. In order to stably clamp the round bar and effectively prevent the round bar from rotating around its own axis during processing, a V-shaped groove is opened on the bottom surface of the slide rail 204. Correspondingly, the groove on the base 1 is also set as a V-shaped groove structure. The V-shaped groove of the base 1 and the V-shaped groove of the slide rail 204 are set to correspond to each other, so that the round bar can be reliably clamped and circumferentially limited from top to bottom.

[0022] Working principle: When fixing the bar, first rotate the bolt 301 in the opposite direction to raise the U-groove lower pressure plate 302 together with the slide rail 204 locked to it. Then, place the bar in the groove of the base 1 for accommodating the bar. Next, rotate the bolt 301 clockwise. Due to the threaded connection between the bolt 301 and the base 1, the bolt 301 moves downward. The lower end of the bolt 301 presses down on the U-groove lower pressure plate 302. During the downward movement of the U-groove lower pressure plate 302, the limiting post 303 fixedly connected to the bottom of the U-groove lower pressure plate 302 slides smoothly in the second hole 304 of the base 1, guiding the downward stroke of the U-groove lower pressure plate 302 to ensure the stability of the downward pressure. Finally, the U-groove lower pressure plate 302 drives the slide rail 204 to press against the top of the bar, firmly fixing the bar between the base 1 and the slide rail 204. At the same time, the outer wall of the bar is pressed tightly against the anti-slip plate 4. When it is necessary to replace the slide rail 204 with a different specification to accommodate different bars, first pull the pin 201 out of the through hole of the U-groove pressure plate 302 and the first hole 206 of the slide rail 204 to disconnect the slide rail 204 from the U-groove pressure plate 302. Then, the slide rail 204 can be pulled out along the slide groove 205 on the base 1. During the process of pulling out the slide rail 204, the limiting plate 203 fixed to the side wall of the slide rail 204 slides inside the empty groove plate 202, providing a stable guide for the replacement process. After taking out the old slide rail 204, push the new slide rail 204 into the slide groove 205, align the hole, and reinsert the pin 201 to complete the replacement operation. The whole process does not require complicated tools and is easy to operate.

Claims

1. Fixtures for machining keyways longitudinally on bar stock, including: The base (1) has a groove, a slide (205) and a second hole (304) for accommodating the rod. The fixing component (3) includes: a bolt (301), a U-groove lower pressure plate (302) and a limiting post (303) fixedly connected to the bottom of the U-groove lower pressure plate (302). The bolt (301) is threaded to the base (1) and its lower end abuts against the upper surface of the U-groove lower pressure plate (302). The limiting post (303) is slidably fitted in the second hole (304). Its characteristic is that it further includes: The clamp assembly (2) includes a slide rail (204) and a pin (201). The slide rail (204) is slidably disposed in the slide groove (205), and a first hole (206) is provided on the slide rail (204). The pin (201) is inserted and detachably disposed between the U-groove lower pressure plate (302) and the first hole (206) to realize the detachable connection between the clamp assembly (2) and the fixing assembly (3).

2. The fixture for fixing the longitudinal machining of keyways on bar stock according to claim 1, characterized in that: The clamp assembly (2) further includes a slotted plate (202) and a limiting plate (203) fixedly connected to the side wall of the slide rail (204), wherein the limiting plate (203) is slidably connected to the slotted plate (202).

3. The fixture for longitudinally machining keyways on bar stock according to claim 1, characterized in that: An anti-slip plate (4) is fixedly connected to one side of the inner wall of the groove of the base (1).

4. The fixture for longitudinally machining keyways on bar stock according to claim 3, characterized in that: The working surface of the anti-slip plate (4) is a knurled surface or coated with a high-friction material layer.

5. The fixture for longitudinally machining keyways on bar stock according to claim 1, characterized in that: The bottom surface of the slide rail (204) is provided with a V-shaped groove.

6. The fixture for longitudinally machining keyways on bar stock according to claim 5, characterized in that: The groove of the base (1) is a V-shaped groove structure, and is set in accordance with the V-shaped groove of the slide rail (204).

7. The fixture for longitudinally machining keyways on bar stock according to claim 1, characterized in that: The U-groove pressure plate (302) has a through hole for the pin (201) to pass through.

8. The fixture for fixing the longitudinal machining of keyways on a bar as described in claim 2, characterized in that: The hollow slot plate (202) is fixedly connected to the base (1).

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