A bolt clamping tool

Abstract

The utility model discloses a bolt clamping frock relates to machining technical field. A bolt clamping frock, include: fixed base, clamp plate, a plurality of chuck and cylinder, clamp plate parallel is located above fixed base, and the interval is provided with a plurality of holes on the clamp plate, cylinder solid connection is below fixed base, and the drive link of cylinder vertical penetrates fixed base and is solidly connected with the bottom surface of clamp plate, a plurality of chuck solid connection is on fixed base, and every chuck vertical penetrates in the hole of corresponding position. The utility model can adapt to machining center, realizes batch synchronous clamping and accurate positioning of the bolt to be milled, can effectively offset the directional cutting force when milling, avoids bolt displacement or rotation, guarantees the machining accuracy, and its installation is stable, and reset is convenient, can match machining center high -efficient operation rhythm, solves the problem that traditional frock single workstation is low in efficiency and is insufficient in clamping stability, satisfies bolt batch milling production demand.

Description

Technical Field

[0001] This utility model relates to the field of machining technology, specifically to a bolt clamping fixture. Background Technology

[0002] In the industrial manufacturing sector, bolts, as widely used basic fasteners, play a crucial role in connecting and securing components. However, not all bolts are manufactured using a uniform method; some bolts with specific structural types (such as...) Figure 4 For bolts shown, since the head needs to be shaped with irregular grooves, precise end faces or specific contours, conventional machining methods are difficult to meet the accuracy requirements. Therefore, it is necessary to use a machining center and strictly follow the design drawings to complete the head milling process.

[0003] Specifically, Figure 4 The head milling process of the bolt shown has two core technical requirements: First, when the milling tool of the machining center comes into contact with the bolt head, it will generate a directional cutting force. If the bolt clamping is unreliable, it is easy to cause axial displacement or circumferential rotation of the bolt, which will affect the product machining accuracy. Second, in industrial mass production scenarios, it is necessary to achieve simultaneous clamping and processing of multiple bolts to match the efficient operation rhythm of the machining center and avoid the production capacity bottleneck caused by low efficiency of single-station clamping and single-processing.

[0004] In summary, regarding Figure 4 The bolts shown here require milling of their heads by a machining center. How to develop a bolt clamping fixture that can meet the requirements of batch synchronous clamping, precise positioning, and adapt to the machining center's operation process is a technical problem that urgently needs to be solved by those skilled in the art.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0006] To address the aforementioned technical problems, this utility model provides a bolt clamping fixture to solve the issues raised in the background section.

[0007] This utility model provides the following technical solution: a bolt clamping fixture, comprising: a fixed base, a clamping plate, several clamps and a cylinder;

[0008] The clamp is positioned parallel above the fixed base, and several channels are spaced apart on the clamp.

[0009] The cylinder is fixedly connected to the bottom of the fixed base, and the cylinder's drive rod vertically passes through the fixed base and is fixedly connected to the bottom surface of the clamping plate.

[0010] Several clamps are fixed to the base, and each clamp passes vertically through the corresponding hole.

[0011] The clamp is composed of multiple arc-shaped clamping petals arranged in a circular array, with a limiting flange provided on the outer side of the root of the clamping petals.

[0012] Preferably, the limiting flange surrounds the outer side of the root of a single clamping petal and is constructed as a continuous, outwardly convex annular structure along the contour of the arcuate cross-section of the clamping petal.

[0013] Preferably, the outer diameter of the overall structure formed by the multiple clamping lobes arranged in a circular array is smaller than the inner diameter of the channel, and the outer diameter of the limiting flange is larger than the inner diameter of the channel.

[0014] Preferably, the clamping plate is provided with a guide hole, and the fixing base is fixedly connected with a guide post that is configured to cooperate with the guide hole.

[0015] Preferably, a mounting base is fixedly connected to each of the two sides of the fixed base.

[0016] Preferably, the cylinder includes two cylinders, which are fixedly connected to the bottom of the fixed seat at an interval, and the drive rod of each cylinder passes vertically through the fixed seat and is fixedly connected to the bottom surface of the clamping plate.

[0017] The bolt clamping fixture provided in this embodiment of the utility model has the following beneficial effects:

[0018] (1) This utility model can be adapted to a machining center to achieve batch synchronous clamping and precise positioning of bolts to be milled, effectively counteracting the directional cutting force during milling, avoiding bolt displacement or rotation, and ensuring machining accuracy.

[0019] (2) This utility model is stable to install and easy to reset. It can match the high-efficiency operation rhythm of the machining center, solve the problems of low efficiency and insufficient clamping stability of traditional tooling single station, and meet the needs of batch milling production of bolts. Attached Figure Description

[0020] Figure 1 This is a structural schematic diagram of the present invention from angle one;

[0021] Figure 2 This is a schematic diagram of the structure of this utility model from angle two;

[0022] Figure 3 This is a structural schematic diagram of angle three of this utility model;

[0023] Figure 4 This is a schematic diagram of the structure of this utility model after the bolts are assembled;

[0024] Figure 5 This utility model Figure 1 Schematic diagram of the cross-sectional structure along the AA direction;

[0025] Figure 6 This utility model Figure 3 A magnified view of part B in the image;

[0026] Figure 7 This utility model Figure 5 A magnified view of part C. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0028] See Figures 1-7 To address the problems mentioned in the background section, this utility model provides a bolt clamping fixture to solve the aforementioned technical problems. The technical solution is as follows:

[0029] A bolt clamping fixture includes: a fixed base 110, a clamping plate 120, several chucks 130 and a cylinder 150;

[0030] The clamping plate 120 is positioned parallel above the fixing base 110, and a number of holes 121 are provided on the clamping plate 120 at intervals.

[0031] The cylinder 150 is fixedly connected to the bottom of the fixed base 110, and the drive rod of the cylinder 150 passes vertically through the fixed base 110 and is fixedly connected to the bottom surface of the clamping plate 120.

[0032] Several clamps 130 are fixed above the fixed base 110, and each clamp 130 is vertically inserted through the corresponding hole 121;

[0033] The clamp 130 is composed of multiple clamping petals 131 with arc-shaped cross sections arranged in a circular array, and a limiting flange 132 is provided on the outer side of the root of the clamping petals 131.

[0034] In this embodiment, the limiting flange 132 is provided around the outer side of the root of the single clamping lobe 131, and is constructed as a continuous, outwardly protruding annular structure along the contour of the arc-shaped cross section of the clamping lobe 131.

[0035] In this embodiment, the outer diameter of the overall structure formed by the circular array of multiple clamping lobes 131 is smaller than the inner diameter of the channel 121, and the outer diameter of the limiting flange 132 is larger than the inner diameter of the channel 121.

[0036] It should be noted that the overall outer diameter of the array of multiple clamping petals 131 is smaller than the inner diameter of the channel 121, so that the clamping petals 131 can open naturally when the clamping plate 120 moves upward, leaving sufficient space for the bolt to be inserted into the clamp 130, and ensuring smooth batch feeding.

[0037] The outer diameter of the limiting flange 132 is larger than the inner diameter of the channel 121. When the clamping plate 120 moves down, the inner wall of the channel can precisely squeeze the limiting flange, causing the clamping disc to contract synchronously towards the center, ultimately achieving reliable clamping of the bolt.

[0038] In this embodiment, the clamping plate 120 is provided with a guide hole, and the fixing base 110 is fixedly connected with a guide post 160 that is configured to cooperate with the guide hole.

[0039] In this embodiment, a mounting base 170 is fixedly connected to each of the two sides of the fixed base 110.

[0040] In this embodiment, there are two cylinders 150. The two cylinders 150 are fixedly connected to the base 110 at intervals. The drive rod of each cylinder 150 passes vertically through the base 110 and is fixedly connected to the bottom surface of the clamping plate 120.

[0041] The present invention provides a method for storing a bolt clamping fixture as follows:

[0042] (1) Fixture installation and positioning: First, the entire bolt clamping fixture is detachably fixed on the worktable of the machining center by the two mounting seats 170 fixed on both sides of the fixed seat 110, ensuring that the overall fixture is precisely aligned with the milling station of the machining center, providing a stable reference for subsequent bolt milling.

[0043] (2) Initial state preparation: After the tooling is installed, the drive rod of the control cylinder 150 is in the extended state. At this time, the drive rod of the cylinder 150 pushes the clamping plate 120 upward, so that the clamping plate 120 moves upward to the upper limit position along the guide column 160 fixed on the fixed seat 110. In this state, the multiple arc-shaped clamping petals 131 in the chuck 130 are not squeezed and remain in a naturally open state, leaving sufficient space for bolt loading.

[0044] (3) Bolt batch feeding: Insert the bolts to be milled head into the center holes of several chucks 130 one by one, so that the bolt shank extends downward along the channel formed by the chuck 131, and the bolt head is supported on the top surface of the chuck 130, thus completing the synchronous feeding of multiple bolts to meet the batch processing requirements. Figure 4 As shown.

[0045] (4) Bolt clamping and positioning: The control cylinder 150 retracts, and the drive rod of the cylinder 150 pulls the clamping plate 120 downward. At this time, the clamping plate 120 moves smoothly downward vertically under the guidance of the guide post 160 and the guide hole. As the clamping plate 120 moves downward, the inner wall of the channel 121 gradually contacts the limiting flange 132 on the outer side of the root of the clamping petal 131. The inner wall of the channel 121 will generate a radially inward squeezing force on the limiting flange 132. This force is transmitted to the clamping petal 131, causing multiple clamping petals 131 arranged in a circular array to contract synchronously towards the center until the inner wall of the clamping petal 131 is tightly attached to the outer wall of the bolt shank, thereby achieving axial positioning and circumferential clamping of the bolt and preventing displacement or rotation of the bolt during milling.

[0046] (5) Bolt head milling: After all bolts are clamped, the machining center starts according to the preset milling program. The milling cutter moves to the milling station corresponding to the fixture and mills the clamped bolt head. During the machining process, because the clamping force of the clamping plate 131 on the bolt is stable and the fixture is firmly fixed by the mounting base 170, the directional cutting force generated by the milling cutter can be effectively offset, ensuring that the bolt milling accuracy meets the drawing requirements.

[0047] (6) Unloading and Fixture Reset: After the bolt head is milled, the milling cutter of the machining center is reset; then the control cylinder 150 extends again, and the cylinder 150 drive rod pushes the clamping plate 120 upward along the guide post 160. The squeezing force of the inner wall of the channel 121 on the limiting flange 132 disappears, and the clamping plate 131 returns to its natural open state under its own elasticity, releasing the clamping of the bolt. Finally, the processed bolts are removed one by one from the chuck 130, and the fixture returns to its initial ready state, ready to enter the next batch of bolt processing cycle.

[0048] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0049] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0050] It is understood that those skilled in the art can make equivalent substitutions or changes based on the technical solution and concept of this utility model, and all such substitutions or changes should fall within the protection scope of the appended claims.

Claims

1. A bolt clamping fixture, characterized in that, Includes: a mounting base, clamping plates, several chucks, and a cylinder; The clamp is positioned parallel above the fixed base, and several channels are spaced apart on the clamp. The cylinder is fixedly connected to the bottom of the fixed base, and the cylinder's drive rod passes vertically through the fixed base and is fixedly connected to the bottom surface of the clamping plate. Several clamps are fixed to the base, and each clamp passes vertically through the corresponding hole. The clamp is composed of multiple arc-shaped clamping petals arranged in a circular array, with a limiting flange provided on the outer side of the root of the clamping petals.

2. The bolt clamping fixture according to claim 1, characterized in that, The limiting flange surrounds the outer side of the root of a single clamping petal and is constructed as a continuous, outwardly convex ring structure along the contour of the arc-shaped cross-section of the clamping petal.

3. The bolt clamping fixture according to claim 1, characterized in that, The outer diameter of the overall structure formed by multiple clamping lobes arranged in a circular array is smaller than the inner diameter of the channel, while the outer diameter of the limiting flange is larger than the inner diameter of the channel.

4. The bolt clamping fixture according to claim 1, characterized in that, The clamp is provided with guide holes, and the fixed base is fixed with guide posts that are matched with the guide holes.

5. The bolt clamping fixture according to claim 1, characterized in that, A mounting base is fixed to each of the two sides of the fixed base.

6. The bolt clamping fixture according to claim 1, characterized in that, The cylinder consists of two cylinders, which are fixedly connected to the base at an interval. The drive rod of each cylinder passes vertically through the base and is fixedly connected to the bottom surface of the clamping plate.

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