Clamping device for machining of castings

Abstract

The utility model relates to a kind of clamping devices for casting processing, including base and rotating seat, base top is provided with vertical plate and crossbeam, rotating seat can rotate around crossbeam by installing arc plate, the adjustment of clamping angle is realized;Rotating seat top is provided with second sliding slot, sliding slot is equipped with sliding seat, sliding seat is driven by bidirectional screw rod and moves towards each other, to drive clamping block clamping casting;The first sliding slot is equipped in base interior, sliding slot is slidably installed with tooth plate, tooth plate is engaged with the protruding tooth on installing arc plate, moving block is driven by threaded rod, linkage connecting rod drives tooth plate to move, the fine adjustment and positioning of rotating seat angle are realized;Rotating seat is equipped with the swingable protective side plate before and after, for shielding rotating gap, prevent iron filings into device interior.The device structure is stable, clamping range is wide, angle is adjustable, protection effect is good, suitable for the clamping needs of casting processing of multiple sizes and shapes.

Description

Technical Field

[0001] This utility model belongs to the field of machining fixture technology, specifically relating to a clamping device for casting processing. Background Technology

[0002] In the mechanical manufacturing process, before machining processes such as turning, milling, or drilling, castings typically need to be stably fixed on the machining platform using clamping devices to ensure machining accuracy and safety. This is especially true for castings with irregular shapes or large dimensions, which rely even more heavily on clamping equipment that is structurally stable and easy to adjust.

[0003] Existing casting clamping devices typically use unidirectional screws or hydraulic mechanisms to drive clamping blocks, making it difficult to accommodate castings of different sizes. Furthermore, some clamping structures lack adjustable clamping angles; when the machining angle of the casting needs to be changed, disassembly and re-clamping are often required, increasing operation time and potentially affecting clamping repeatability. Additionally, some adjustable angle structures lack reliable self-locking mechanisms after adjustment, posing a risk of loosening and compromising the stability of the machining process.

[0004] On the other hand, the casting process often generates a large amount of iron filings and slag. If the structural design is unreasonable, these debris can easily fall into the internal gaps of the device, causing wear or even jamming of key components such as internal slide rails and gear plates, affecting the service life and reliability of the device. Some existing clamping devices do not protect the structural gaps, making it difficult to balance angle adjustment and protective sealing, which allows contaminants in the processing environment to easily enter. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of this utility model is to provide a clamping device for casting processing, which can adapt to the clamping requirements of castings of different sizes, has a convenient angle adjustment function and reliable self-locking clamping force, and can effectively prevent iron filings from entering the structural gaps.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a clamping device for casting processing, comprising a base and a rotating seat, wherein the base is hollow inside with an open top, and upright plates are symmetrically arranged on both sides of the top of the base, and a crossbeam is fixed between the two upright plates, the crossbeam spanning across the top of the base;

[0007] The rotating seat is placed above the base, and the bottom of the rotating seat is symmetrically provided with mounting arc plates. The two mounting arc plates rotate at both ends of the crossbeam surface to control the swing angle of the casting through the rotating seat.

[0008] The top of the rotating seat is symmetrically provided with second sliding grooves, and a sliding block is slidably installed inside each of the two second sliding grooves. A clamping block is installed on the side of the two sliding blocks that are close to each other for clamping the casting.

[0009] Furthermore, a bidirectional screw is rotatably mounted inside the two second slide grooves, and the two slide blocks are respectively screwed onto different threaded surfaces of the bidirectional screw. A knob is provided at the end of the bidirectional screw.

[0010] Furthermore, mounting shafts are fixed on both the front and rear surfaces of the rotating base, and protective side plates are rotatably mounted on the surface of the mounting shafts, covering the outside of the gap between the base and the rotating base.

[0011] Furthermore, the lower curved surface of the mounting arc plate is uniformly provided with protruding teeth centered on the axis of the crossbeam.

[0012] Furthermore, all the first sliding grooves are opened on both sides of the interior of the base, and toothed plates are slidably installed inside the two first sliding grooves. The toothed plates are placed below the mounting arc plate, and the toothed plates mesh with the convex teeth.

[0013] Furthermore, a threaded rod is rotatably mounted inside the lower part of the base, the threaded rod is perpendicular to the crossbeam, and a knob is provided at the end of the threaded rod.

[0014] Furthermore, a movable block is screwed onto the surface of the threaded rod, and connecting rods are provided on both sides of the movable block. The ends of the two connecting rods opposite to the movable block are respectively mounted on the toothed plates to control the movement of the two toothed plates.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] By setting a second slide groove on the top of the rotating seat and installing a slide block inside it, the two slide blocks are driven to move towards each other by a bidirectional screw, so that the clamping block can flexibly clamp castings of different sizes. This solves the problem of fixed clamping range and poor adaptability of existing clamping devices. At the same time, the positive and negative thread structure of the bidirectional screw achieves self-locking clamping, avoiding loosening during processing and improving clamping stability and safety.

[0017] By installing an arc plate at the bottom of the rotary seat and swinging the arc plate around the crossbeam as the axis, and combining the meshing of the toothed plate inside the base with the protruding teeth on the arc plate, the rotating seat angle can be finely adjusted and positioned by adjusting the threaded rod to drive the moving block, which in turn drives the toothed plate. This solves the problem that existing clamping structures cannot adjust the clamping angle or are inaccurate, improves clamping flexibility, facilitates processing operations at different angle positions, and improves processing efficiency.

[0018] By setting protective side plates in front of and behind the rotating base and allowing the protective side plates to swing freely around the mounting shaft, the protective side plates can always cover the gap between the base and the rotating base when the rotating base is adjusted in angle. This solves the problem in the prior art where exposed structural gaps cause iron filings to invade and damage the internal structure, improves the protective capability and service life of the device, and ensures reliable operation during long-term processing. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a cross-sectional front view of the three-dimensional structure of this utility model;

[0021] Figure 3 This is a cross-sectional left view of the structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the rotating seat structure of this utility model;

[0023] Figure 5 This is a schematic diagram of the base structure of this utility model;

[0024] Figure 6 This is a schematic diagram of the toothed plate and moving block structure of this utility model.

[0025] The attached diagram lists the components represented by each number as follows:

[0026] 1. Base; 11. Vertical plate; 12. Horizontal beam; 13. First slide groove; 14. Threaded rod; 2. Rotary seat; 21. Mounting arc plate; 22. Convex tooth; 23. Second slide groove; 24. Mounting shaft; 3. Double-acting screw; 4. Slide seat; 41. Clamping block; 5. Protective side plate; 6. Toothed plate; 7. Moving block; 71. Connecting rod. Detailed Implementation

[0027] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0028] refer to Figures 1-6As shown, a clamping device for casting processing includes a base 1 and a rotating seat 2. The base 1 is hollow inside with an open top. Symmetrical upright plates 11 are arranged on both sides of the top of the base 1, and a crossbeam 12 is fixed between the two upright plates 11, spanning across the base 1. The base 1 is fixedly connected to the processing platform by bolts to ensure clamping stability. The upright plates 11 are fixed to the base 1 by welding to support the crossbeam 12 and bear the rotation structure of the rotating seat 2. The crossbeam 12 is made of high-strength metal material to withstand the swing load of the rotating seat 2 and also serves as the support foundation for the rotation shaft. The connection between the crossbeam 12 and the upright plates 11 is achieved by screw fastening supplemented by a locating pin structure to improve the overall rigidity and accuracy of the device. The inner cavity of the base 1 is a cavity structure to accommodate the angle adjustment mechanism and the toothed plate sliding mechanism.

[0029] The rotating seat 2 is placed above the base 1. The bottom of the rotating seat 2 is symmetrically equipped with mounting arc plates 21. The two mounting arc plates 21 rotate at both ends of the surface of the crossbeam 12 to control the swing angle of the casting through the rotating seat 2. The mounting arc plates 21 are sleeved on both ends of the crossbeam 12 with shaft hole structure and the rotation range is positioned by limit pins. The mounting arc plates 21 are provided with a uniformly distributed toothed groove structure for meshing with toothed plates 6 to achieve precise locking of the angle position. The rotating seat 2 is an integrated casting structure with limit blocks on its outer periphery to limit the rotation angle and ensure the stability of the casting after clamping. A gap is provided between the bottom edge of the rotating seat 2 and the base 1. This gap is covered by a protective side plate 5 to prevent iron filings from entering the device.

[0030] The top of the rotating base 2 is symmetrically provided with second slide grooves 23. Slide seats 4 are slidably installed inside the two second slide grooves 23. Clamping blocks 41 are installed on the side of the two slide seats 4 that are close to each other for clamping the casting. The second slide grooves 23 are rectangular guide rail grooves used to limit the movement trajectory of the slide seats 4. The slide seats 4 are made of high-strength steel and the sliding mating surfaces are coated with a self-lubricating coating to reduce frictional resistance. The clamping blocks 41 are installed on the inner end face of the slide seats 4 by screws and rubber gaskets are used to enhance the contact stability with the casting, which is suitable for castings of various shapes. Limiting blocks are set at both ends of the slide seats 4 to prevent them from sliding out of the second slide grooves 23.

[0031] refer to Figure 1 and Figure 4 As shown, two bidirectional screws 3 are rotatably installed inside the two second slide grooves 23. Two slide blocks 4 are screwed onto different threaded surfaces of the bidirectional screws 3. A knob is provided at the end of the bidirectional screws 3. One end of the bidirectional screws 3 has a positive thread and the other end has a negative thread. By rotating, the two slide blocks 4 can be driven to move in opposite directions simultaneously to clamp or release the casting. The bidirectional screws 3 are made of high-strength wear-resistant threaded rods, and the surface is electroplated to prevent corrosion. A metal knob is provided at the end of the bidirectional screws 3 for manually adjusting the clamping force. The structural design achieves self-locking to prevent the clamping from loosening.

[0032] refer to Figure 1 and Figure 3 As shown, mounting shafts 24 are fixed on both the front and rear surfaces of the rotating base 2. Protective side plates 5 are rotatably mounted on the surface of the mounting shafts 24, covering the outside of the gap between the base 1 and the rotating base 2. The mounting shafts 24 are short shaft structures, set on the front and rear end faces of the rotating base 2, axially inserting the protective side plates 5 and allowing them to rotate freely around the shaft. The protective side plates 5 adopt a gravity swing structure design and are in a vertically suspended state. They automatically offset as the angle of the rotating base 2 is adjusted to continuously cover the gap between the rotating part and the base, preventing iron filings splashed during processing from entering the interior of the base 1 and affecting the normal operation of the sliding mechanism and the toothed plate meshing parts.

[0033] refer to Figure 3 As shown, the lower curved surface of the mounting arc plate 21 is uniformly provided with protruding teeth 22 centered on the axis of the crossbeam 12; the protruding teeth 22 are set as equidistant tooth-shaped structures along the lower curved surface of the mounting arc plate 21, which are used to mesh with the toothed plate 6 inside the base 1; the protruding teeth 22 are formed by integral milling and the surface is hardened to improve wear resistance; the protruding teeth 22 dynamically mesh with the toothed plate 6 during the swing of the rotating seat 2 to realize the fixation and adjustment control of the rotation angle position.

[0034] refer to Figure 3 and Figure 5 As shown, the base 1 has first sliding grooves 13 on both sides inside. A toothed plate 6 is slidably installed inside the two first sliding grooves 13. The toothed plate 6 is placed below the mounting arc plate 21, and the toothed plate 6 meshes with the convex teeth 22. The first sliding groove 13 is a rectangular guide rail structure, which is arranged parallel to the two side walls of the inner cavity of the base 1 to guide the toothed plate 6 to slide back and forth. The toothed plate 6 is a rack structure, and the meshing surface matches the shape of the convex teeth 22 of the mounting arc plate 21 to ensure transmission accuracy. The toothed plate 6 is made of steel material, and the tooth shape is a straight tooth structure. The toothed plate 6 is provided with a screw hole structure for installing the connecting rod 71 to realize linkage with the angle adjustment mechanism.

[0035] refer to Figure 5 and Figure 6 As shown, a threaded rod 14 is rotatably installed inside the lower part of the base 1. The threaded rod 14 is perpendicular to the crossbeam 12, and a knob is provided at the end of the threaded rod 14. The threaded rod 14 passes through the shaft hole in the lower cavity of the base 1 and is supported by a bearing structure to achieve rotation. The threaded rod 14 has a standard pitch and can drive the moving block 7 screwed on it to slide up and down when rotated, so as to realize the angle adjustment linkage. A metal knob is connected to one end of the threaded rod 14. The surface of the knob is provided with anti-slip stripes for manual operation. The overall structural design of the threaded rod 14 meets the reverse self-locking requirements to avoid angle drift after adjustment.

[0036] refer to Figure 5 and Figure 6As shown, a movable block 7 is screwed onto the surface of the threaded rod 14. Connecting rods 71 ​​are provided on both sides of the movable block 7. The ends of the two connecting rods 71 ​​opposite to the movable block 7 are respectively installed on the toothed plates 6 to control the movement of the two toothed plates 6. The movable block 7 is a square threaded sleeve block, which is screwed onto the threaded rod 14 through its internal threads and slides along the axial direction of the threaded rod 14. The connecting rods 71 ​​are high-strength metal tie rods. One end of the connecting rod 71 is fixed to both sides of the movable block 7 by bolts, and the other end is installed in the threaded hole in the middle of the toothed plate 6 by a threaded connection. When the threaded rod 14 is rotated, the movable block 7 moves axially, causing the connecting rods 71 ​​to move synchronously, thereby driving the two toothed plates 6 to slide along the direction of the first sliding groove 13, and thus generating relative movement with the convex teeth 22, realizing the angle fine adjustment and locking function of the rotating seat 2.

[0037] The working principle of this utility model is as follows: First, the base 1 is fixed by bolts. Then, the casting is placed between two slide blocks 4. The bidirectional screw 3 is rotated to control the two slide blocks 4 to move closer to each other through different thread surfaces, so that the casting is clamped and fixed by the clamping block 41. The knob at the end of the threaded rod 14 is rotated to control the rotation of the threaded rod 14, and then the moving block 7 is moved back and forth. The toothed plates 6 on both sides are controlled to slide inside the first slide groove 13 by the connecting rod 71. At this time, the installation arc plate 21 can be rotated by the meshing of the toothed plate 6 and the convex tooth 22, so that the rotating seat 2 rotates around the surface of the crossbeam 12 to adjust the swing angle of the rotating seat 2, thereby controlling the angle of the casting after clamping, which is convenient for subsequent processing. During this process, the clamping force of the two slide blocks 4 is fixed by the reverse self-locking of the bidirectional screw 3, and the angle of the rotating seat 2 is fixed by the reverse self-locking of the threaded rod 14. This structure can clamp different castings and keep the casting in the center position of the device. The angle of the casting after clamping can be adjusted without re-clamping, which is convenient for subsequent machining.

[0038] The rotating seat 2 can swing within a certain range, so there must be a gap between the rotating seat 2 and the base 1. During the processing, iron filings may jump into the interior of the base 1 and affect the internal parts. Therefore, a free-moving protective side plate 5 is provided on the outside of the base 1 and the rotating seat 2. The protective side plate 5 will be vertically downward due to its own weight, so that when adjusting the swing angle of the rotating seat 2, the protective side plate 5 will always cover the gap between the two to prevent iron filings from entering.

[0039] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A clamping device for casting processing, comprising a base (1) and a rotating seat (2), characterized in that: The base (1) is hollow inside with an open top. There are upright plates (11) symmetrically arranged on both sides of the top of the base (1). A crossbeam (12) is fixed between the two upright plates (11) and the crossbeam (12) spans across the top of the base (1). The rotating seat (2) is placed above the base (1). The bottom of the rotating seat (2) is symmetrically provided with mounting arc plates (21). The two mounting arc plates (21) rotate at both ends of the surface of the crossbeam (12) respectively, so as to control the swing angle of the casting through the rotating seat (2). The top of the rotating seat (2) is symmetrically provided with second slide grooves (23), and slide blocks (4) are slidably installed inside the two second slide grooves (23). Clamping blocks (41) are installed on the side of the two slide blocks (4) that are close to each other for clamping the casting.

2. The clamping device for casting processing according to claim 1, characterized in that: Two bidirectional screws (3) are rotatably mounted inside the two second slide grooves (23), and the two slide blocks (4) are respectively screwed onto different thread surfaces of the bidirectional screws (3). A knob is provided at the end of the bidirectional screws (3).

3. The clamping device for casting processing according to claim 1, characterized in that: The rotating seat (2) has a mounting shaft (24) fixed on both the front and rear surfaces. A protective side plate (5) is rotatably mounted on the surface of the mounting shaft (24). The protective side plate (5) covers the outside of the gap between the base (1) and the rotating seat (2).

4. The clamping device for casting processing according to claim 1, characterized in that: The lower curved surface of the mounting arc plate (21) is uniformly provided with protruding teeth (22) with the axis of the crossbeam (12) as the center.

5. A clamping device for casting processing according to claim 4, characterized in that: The base (1) has all the first sliding grooves (13) on both sides inside. The toothed plates (6) are slidably installed inside the two first sliding grooves (13). The toothed plates (6) are placed below the mounting arc plate (21). The toothed plates (6) and the protruding teeth (22) mesh with each other.

6. A clamping device for casting processing according to claim 5, characterized in that: A threaded rod (14) is rotatably mounted inside the base (1). The threaded rod (14) is perpendicular to the crossbeam (12), and a knob is provided at the end of the threaded rod (14).

7. A clamping device for casting processing according to claim 6, characterized in that: The threaded rod (14) has a movable block (7) screwed onto its surface. Connecting rods (71) are provided on both sides of the movable block (7). The ends of the two connecting rods (71) away from the movable block (7) are respectively mounted on the toothed plate (6) to control the movement of the two toothed plates (6).

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