A large-size tool for workpieces with an inner diameter larger than the outer diameter of a rotating table

Abstract

The utility model discloses a large -size tool for workpiece inner diameter is greater than the rotating platform outer diameter, including the circular ring metal chassis of being fixed on the rotating platform through a plurality of mounting studs. Along the circumferential direction is respectively distributed a plurality of internal compression mechanism and external support mechanism on the inside and outside of the workpiece to be clamped. Each internal compression mechanism includes L type pressing plate and internal T type bolt to compress the workpiece. Each external support mechanism includes external positioning tool and height adjusting assembly. The external positioning tool supports the outer edge of the workpiece, and is a Z-shaped structural member as a whole, including the inside horizontal plate of supporting the workpiece, vertical connecting plate, the outside horizontal plate for installation and height adjustment. The vertical connecting plate bottom wall is equipped with arc boss, and each outside horizontal plate is connected with an external T type bolt, and the bolt outside connects height adjusting assembly, is used for adjusting the inside horizontal height of Z-shaped structural member bottom. Adopting this structure can realize the stable clamping of the workpiece with the inner diameter greater than the rotating platform outer diameter.

Description

Technical Field

[0001] This utility model relates to laser processing equipment, specifically to a rotary table fixture suitable for mounting large workpieces whose inner diameter is greater than the outer diameter of the rotary table. Background Technology

[0002] In the field of laser processing, rotary tables are crucial equipment for achieving multi-dimensional machining of workpieces. In existing technologies, the clamping fixtures typically used with rotary tables are designed primarily for workpieces with an inner diameter less than or equal to the outer diameter of the rotary table. For example... Figure 3 As shown, the structure of workpiece 4 is a rotating disk body, with the inner edge extending upward to form an upper boss and the lower part extending downward to form a lower boss. For large-sized rotating workpieces with asymmetrical height, the traditional clamping method has the following technical defects:

[0003] 1. Insufficient clamping stability: When the inner diameter of the workpiece exceeds the outer diameter of the rotary table, the traditional clamping plate cannot form an effective radial constraint, which can easily cause the workpiece to shift or fall off during high-speed rotation.

[0004] 2. Limited adjustment accuracy: Existing tooling mostly uses fixed positioning blocks, which cannot be finely adjusted according to the actual size of the workpiece, making it difficult to guarantee the focusing accuracy of the laser beam after mounting. Summary of the Invention

[0005] The purpose of this utility model is to overcome the problems existing in the prior art and provide a large-size tooling for workpieces with an inner diameter greater than the outer diameter of the rotary table. This tooling can be adapted to clamp large-size workpieces with an inner diameter greater than the outer diameter of the rotary table and which are asymmetrical, and has a height fine adjustment function to meet the needs of laser processing.

[0006] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows:

[0007] This utility model discloses a large-size tooling for a workpiece with an inner diameter greater than the outer diameter of a rotary table. It includes a base plate fixed to the rotary table by multiple mounting studs. The base plate is a circular metal base plate, and its inner diameter is smaller than the outer diameter of the rotary table. Multiple internal clamping mechanisms and external support mechanisms are evenly distributed along the circumference of the base plate, on the inner and outer sides of the workpiece to be clamped. Each external support mechanism includes an external positioning fixture and a height adjustment component. Each internal clamping mechanism is used to fix the workpiece internally, including an L-shaped pressure plate and internal T-bolts. The bottom of the internal T-bolts is installed in an inner groove of the base plate, and the bolts of the internal T-bolts pass upward through the inner hole of the horizontal plate of the pressure plate. The top is locked with a nut and a washer to clamp the workpiece. The bottom of the vertical plate of the pressure plate is set to press against the top wall of the base plate.

[0008] Each of the aforementioned external positioning fixtures is used to support the outer edge of the workpiece. The external positioning fixture is an integral Z-shaped structural component, including an inner horizontal plate for supporting the bottom outer side of the workpiece, a vertical connecting plate for clamping the outer end of the bottom horizontal plate, and an upper outer horizontal plate for installation and height adjustment. An arc-shaped boss is provided on the bottom wall of the vertical connecting plate. An external T-bolt is connected to each upper outer horizontal plate. The bottom of the external T-bolt is set in the outer groove at the outer edge of the chassis. The screw of the external T-bolt passes upward through the inner hole of the upper outer horizontal plate, and the top end is locked to the upper outer horizontal plate with a nut and a washer. The aforementioned height adjustment component is connected to the upper outer horizontal plate outside each external T-bolt. The height adjustment component is used to adjust the horizontal height of the inner side of the bottom of the Z-shaped structural component.

[0009] The beneficial effects of this utility model include:

[0010] 1. Overcoming size limitations: Through the synergistic mechanism of external support and internal clamping mechanisms, stable clamping of workpieces with an inner diameter larger than the outer diameter of the rotary table is achieved.

[0011] 2. High-precision adjustment characteristics: With the help of the fine thread structure design of the nut assembly, highly precise micro-adjustment on the order of 0.1mm can be achieved to ensure the coaxiality accuracy during the workpiece clamping process. Attached Figure Description

[0012] Figure 1 This is a top view schematic diagram of the large-size tooling of the present invention, which is used for workpieces with an inner diameter greater than the outer diameter of the rotary table.

[0013] Figure 2 for Figure 1 The tooling shown is in section AA.

[0014] Figure 3 for Figure 1 The tooling shown is a BB cross-sectional view. Detailed Implementation

[0015] The structure of this utility model will be described below with reference to the accompanying drawings.

[0016] As shown in the attached diagram, this utility model provides a large-size tooling for a workpiece with an inner diameter greater than the outer diameter of a rotary table. It includes a base plate fixed to a rotary table 1 by multiple mounting studs 3. The base plate is a circular annular metal base plate 2, and its inner diameter is smaller than the outer diameter of the rotary table. Preferably, there are eight mounting studs evenly distributed along the base plate. Preferably, multiple weight-reducing holes are evenly formed on the base plate to reduce the weight of the device.

[0017] Multiple internal clamping mechanisms and external support mechanisms, for example, eight, are evenly distributed along the circumference of the chassis and on the inner and outer sides of the workpiece 4 to be clamped. Each external support mechanism includes an external positioning fixture 7 and a height adjustment component. Each internal clamping mechanism is used to fix the workpiece internally, including an L-shaped pressure plate and internal T-bolts. The bottom of the internal T-bolts 5 is installed in the inner groove of the chassis, and the screw of the internal T-bolts passes upward through the inner hole of the horizontal plate of the pressure plate. The top is locked with a nut and a washer to clamp the workpiece. The bottom of the vertical plate of the pressure plate is set to press against the top wall of the chassis.

[0018] Each of the aforementioned external positioning fixtures, used to support the outer edge of the workpiece, can be made of steel plate. The external positioning fixture is an integrally Z-shaped structural component, including an inner horizontal plate for supporting the bottom outer side of the workpiece, a vertical connecting plate for clamping the outer end of the bottom horizontal plate, and an upper outer horizontal plate for installation and height adjustment. An arc-shaped boss is provided on the bottom wall of the vertical connecting plate. An external T-bolt is connected to each upper outer horizontal plate. The bottom of the external T-bolt is located in an outer groove at the outer edge of the chassis, and the thread of the external T-bolt passes upward through the inner hole of the upper outer horizontal plate. The top end is locked to the upper outer horizontal plate with a nut and a washer. A height adjustment component is connected to the upper outer horizontal plate outside each external T-bolt. Each height adjustment component is used to adjust the horizontal height of the inner side of the bottom of the Z-shaped structural component, thereby adjusting the height of the workpiece.

[0019] In a preferred embodiment of this utility model, the height adjustment assembly includes an adjusting bolt 8, a pad 9 between the bolt head and the base plate, and the bolt thread passing upward through the inner hole of the upper outer horizontal plate, with an adjusting nut 10 at the top. The adjusting nut and the pad are locked to the upper outer horizontal plate. The height adjustment assembly is key to achieving precise adjustment. An adjusting nut with a pitch of 0.75mm is fitted onto the adjusting bolt, allowing for ±5mm height fine-tuning. Rotating the adjusting nut causes the Z-shaped structural component to rotate around the arc-shaped boss on the bottom wall of the vertical connecting plate, precisely controlling the contact position between the Z-shaped structural component and the workpiece, thereby adjusting the height of the Z-shaped structural component. The pad below the adjusting bolt provides support.

[0020] The following examples illustrate this utility model:

[0021] Machining a ring-shaped workpiece with an inner diameter of Φ700mm (rotary table outer diameter Φ550mm).

[0022] 1. Tooling installation and adjustment

[0023] 1.1 Chassis fixing

[0024] The circular base 2 (inner diameter Φ450mm, thickness 30mm, material 45 steel) is evenly distributed on the upper surface of the rotating 1 by 8 M12 bolts 3 (GB / T 5782-2000); tighten them with a torque wrench to a torque of 50 N·m to ensure that the flatness of the upper surface of the base is ≤0.03mm (compliant with GB / T 1182-2008 requirements).

[0025] 1.2 Installation of internal clamping mechanism

[0026] Install 8 sets of T-bolts 5 evenly distributed at 45° on the inner side (inner diameter Φ700mm) of workpiece 4: Bolt specification: M12×150mm (GB / T 37-2008).

[0027] The pressure plate 6 has an L-shaped structure (with an internal elongated hole 14mm wide to ensure that the T-bolt can pass through), and is fixed to the top of the T-bolt with an M12 nut to press against the workpiece.

[0028] 1.3 Installation and Adjustment of External Positioning Fixtures

[0029] Eight sets of positioning fixtures 7 are evenly distributed on the outer edge of the chassis: 10mm thick, material: 40Cr, surface blackened (rust prevention level reaches GB / T 10125-2012 Grade 8). The horizontal length of the workpiece below is 60mm (parallel to the plane of the rotary table), the vertical height is 80mm (extending upwards to avoid occupying the space below the workpiece), the outer length is 80mm (the internal long hole is 40mm long and 14mm wide, allowing T-bolts to pass through), the tail hole diameter is Φ12 (allowing the adjustment bolt 8 to pass through), and the bottom circular surface is supported on the chassis. A pad 9 is placed below the adjustment bolt 8 for support. The pad is made of 45 steel and is 50mm wide (wider than the T-slot width of the chassis below); the adjustment bolt 8 has an M8 fine thread (pitch 0.75mm, GB / T 244-2007).

[0030] Height adjustment range: ±5mm (the contact height between the external positioning fixture 7 and the workpiece is controlled by rotating the adjusting nut 10).

[0031] 2. Processing verification

[0032] The radial runout of the workpiece was measured using a dial indicator: static runout after mounting: 0.04 mm (meets the processing requirement of ≤0.1 mm); runout when the rotary table is running at 4 rpm: 0.06 mm (meets the stability requirements of laser processing).

[0033] The above specific embodiments have described the present utility model in detail. However, the content of the present utility model is not limited to the above embodiments. As long as the structure can be flexibly changed without exceeding the scope of the present utility model, these changes are all within the protection scope of the present utility model.

Claims

1. A large-size tooling for a workpiece with an inner diameter greater than the outer diameter of a rotary table, characterized in that: The chassis is fixed to the rotary table (1) by multiple mounting studs (3). The chassis is a circular metal chassis (2). The inner diameter of the chassis is smaller than the outer diameter of the rotary table. Multiple internal clamping mechanisms and external support mechanisms are evenly distributed along the circumference of the chassis and on the inner and outer sides of the workpiece (4) to be clamped. Each external support mechanism includes an external positioning fixture (7) and a height adjustment component. Each internal clamping mechanism is used to fix the inside of the workpiece. It includes an L-shaped pressure plate and internal T-bolts. The bottom of the internal T-bolts (5) is installed in the inner groove of the chassis. The screw of the internal T-bolts passes upward through the inner hole of the horizontal plate of the pressure plate. The top is locked with a nut and a washer to clamp the workpiece. The bottom of the vertical plate of the pressure plate is set to press against the top wall of the chassis. Each of the aforementioned external positioning fixtures is used to support the outer edge of the workpiece. The external positioning fixture is a Z-shaped structural component, including an inner horizontal plate for supporting the bottom of the outer side of the workpiece (4), a vertical connecting plate for clamping the outer end of the bottom horizontal plate, and an upper outer horizontal plate for installation and height adjustment. An arc-shaped boss is provided on the bottom wall of the vertical connecting plate. An external T-bolt is connected to each upper outer horizontal plate. The bottom of the external T-bolt is set in the outer groove at the outer edge of the chassis. The screw of the external T-bolt passes upward through the inner hole of the upper outer horizontal plate, and the top end is locked with the upper outer horizontal plate with a nut and a washer. The height adjustment component is connected to the upper outer horizontal plate outside each external T-bolt. The height adjustment component is used to adjust the horizontal height of the inner side of the bottom of the Z-shaped structural component.

2. A large-size tooling for a workpiece with an inner diameter greater than the outer diameter of a rotary table according to claim 1, characterized in that: The height adjustment assembly includes an adjustment bolt (8), a pad (9) is provided between the bottom bolt head of the adjustment bolt and the base plate, the screw of the adjustment bolt passes upward through the inner hole of the upper outer horizontal plate, and the top end is locked to the upper outer horizontal plate with an adjustment nut (10) and a washer.

3. A large-size tooling for a workpiece with an inner diameter greater than the outer diameter of a rotary table, as described in claim 2, characterized in that: The pitch of the adjusting nut is 0.75 mm.

4. A large-size tooling for a workpiece with an inner diameter greater than the outer diameter of a rotary table according to claim 1, characterized in that: Multiple weight-reduction holes are evenly distributed on the chassis.

5. A large-size tooling for a workpiece with an inner diameter greater than the outer diameter of a rotary table according to claim 1, characterized in that: The aforementioned mounting studs consist of eight pieces and are evenly distributed along the chassis.

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