A clamping device for processing a special-shaped casting
Patent Information
- Application Number
- CN202522447472.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-19
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-11-19
AI Technical Summary
Inconsistent positioning datum, accumulated clamping errors, and poor coordination among multiple processes during the multi-process machining of irregularly shaped castings lead to reduced machining accuracy and reduced production efficiency.
A clamping device comprising a first, second, and third clamping unit is designed. The first clamping unit provides a multi-directional positioning reference, the second clamping unit supports the thin-walled part to suppress vibration and deformation, and the third clamping unit enables the connection of multiple processes on the same equipment, reducing manual clamping errors.
It enables the completion of multiple machining processes on a single machine tool, preventing poor connection between multiple processes, reducing clamping errors, and improving machining accuracy and production efficiency.
Smart Images
Figure CN224927454U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of tooling and fixture technology, and more specifically, it relates to a clamping device for machining irregularly shaped castings. Background Technology
[0002] In the field of machining irregularly shaped castings, due to their complex structure, irregular shape, and high dimensional accuracy requirements, traditional machining processes typically require multiple machine tools to complete milling, drilling, tapping, and other operations in sequence. However, existing technologies have the following significant drawbacks.
[0003] Currently, the positioning datum of tooling fixtures on the market is inconsistent: due to the special shape of irregular castings, the fixtures need to be frequently disassembled and assembled during the transfer of multiple processes, which makes it difficult to unify the positioning datum of each process, which can easily lead to the accumulation of processing errors and ultimately result in product dimensions exceeding tolerance or form and position tolerances not meeting the standards. Accumulated clamping error: During sequential machining, each clamping requires repositioning. Due to factors such as fixture accuracy, operational differences, or workpiece deformation, the accumulated error from multiple clampings will significantly reduce machining accuracy, especially for thin-walled or weakly rigid castings. Poor process coordination: Material transfer between multiple machine tools relies on manual labor or simple conveying devices, lacking an integrated clamping system, resulting in long process changeover times and mismatched production rhythms. This not only reduces production efficiency but also makes it easy for additional errors to be introduced due to human intervention. Utility Model Content
[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a clamping device for processing irregularly shaped castings that combines multiple processes.
[0005] To achieve the above objectives, the present invention provides the following technical solution: This utility model is further configured as follows: including a fixed base, the clamping device for processing irregular castings also includes a first clamping unit, a second clamping unit, and a third clamping unit; the first clamping unit is disposed on the fixed base; the first clamping unit is used to position and clamp the product to form a multi-directional positioning reference for the product; the second clamping unit is disposed on the fixed base and located beside the first clamping unit; the second clamping unit is used to support and clamp the thin-walled part of the product based on the positioning reference formed by the first clamping unit to suppress vibration and deformation during side processing of the product; the third clamping unit is disposed on the fixed base and located beside the second clamping unit; the third clamping unit is used to connect the processing of the second clamping unit to realize multi-process processing of the product on the same processing equipment, and reduce manual clamping error and multi-process connection error.
[0006] By adopting the above technical solution, the problems of inconsistent positioning references, accumulated clamping errors, and poor coordination between multiple processes in the existing machining of irregularly shaped castings are solved. These problems include the need for sequential machining across multiple machine tools, the ease with which products can be transferred, and the resulting reduction in machining accuracy and impact on production efficiency. The solution ensures that products are machined on a single machine tool, effectively preventing poor coordination caused by multiple processes and reducing clamping errors.
[0007] The present invention is further configured such that: the first clamping unit includes a first working position, a first auxiliary positioning part and a second auxiliary positioning part; the first working position is disposed on the top of the fixed base and is used to process the positioning groove of the workpiece to be processed; the first auxiliary positioning part has a pair and is disposed on the top of the first working position, and the pair of first auxiliary positioning parts is used to abut against the two sides of the workpiece to be processed; the second auxiliary positioning part is disposed on the top of the first working position and is located between the pair of first auxiliary positioning parts, and the second auxiliary positioning part is used to abut against the upper end surface of the workpiece to be processed.
[0008] The present invention is further configured such that: the first clamping unit also includes a third auxiliary positioning part; the third auxiliary positioning part is disposed at the top of the first working position, and the side of the third auxiliary positioning part is used to abut against the lower end surface of the workpiece to be processed.
[0009] The present invention is further configured such that: the first clamping unit also includes a displacement floating part and a pressure plate; the displacement floating part is slidably disposed on the fixed seat, and the displacement floating part is located in the middle of a pair of first auxiliary positioning parts and on the side of the second auxiliary positioning part; the pressure plate is disposed at the bottom of the displacement floating part, and the pressure plate is used to abut against the inner side of the workpiece to be processed.
[0010] The present invention is further configured such that: the second clamping unit includes a second working position and an auxiliary limiting bar; the second working position is disposed on the top of the fixed base and located beside the first clamping unit; the auxiliary limiting bar is a pair and is disposed on the first working position respectively, and both auxiliary limiting bars are used to abut the top of the processed workpiece.
[0011] The present invention is further configured such that: the second clamping unit also includes a floating support part and a point pressing part; the floating support part has a pair and is respectively arranged on both sides of the first working position, and the pair of first floating support parts are used to abut against both sides of the workpiece after processing the positioning groove.
[0012] The present invention is further configured such that: the third clamping unit includes a third working position, auxiliary positioning columns and a support plate; the third working position is disposed on the top of the fixed base; there are multiple auxiliary positioning columns and they are respectively disposed on the outside of the third working position; there are multiple support plates and they are respectively installed on the third working position; there are multiple support plates and they are respectively rotatably disposed on the third working position.
[0013] By adopting the above technical solutions, the cumulative tolerance caused by product deformation is reduced, and manual clamping errors are avoided.
[0014] In summary, this application includes at least one of the following beneficial technical effects: By setting up a first clamping unit, a second clamping unit, and a third clamping unit, this solution addresses the problems in existing irregular-shaped casting processing where sequential processing across multiple machine tools is required. These problems include inconsistent positioning references and accumulated clamping errors during product transfer, as well as poor coordination between multiple processes leading to reduced machining accuracy and reduced production efficiency. The solution ensures that products are processed on a single machine tool, effectively preventing poor coordination caused by multiple processes and reducing clamping errors. Attached Figure Description
[0015] Figure 1 This is a first-view perspective three-dimensional structural diagram of a clamping device for processing irregularly shaped castings according to the present invention; Figure 2 This is a second-view perspective three-dimensional structural diagram of a clamping device for processing irregularly shaped castings according to this utility model; Figure 3 This is a three-dimensional structural diagram of the first clamping unit of a clamping device for processing irregularly shaped castings according to this utility model; Figure 4 This is a three-dimensional structural diagram of the displacement floating part of a clamping device for processing irregularly shaped castings according to this utility model; Figure 5 This is a three-dimensional structural diagram of the second clamping unit of a clamping device for processing irregularly shaped castings according to this utility model; Figure 6 This is a front view of the second clamping unit of a clamping device for processing irregularly shaped castings according to this utility model; Figure 7 This is a three-dimensional structural diagram of the third clamping unit of a clamping device for processing irregularly shaped castings according to this utility model; Figure 8 This is a front view of the third clamping unit of a clamping device for machining irregularly shaped castings according to this utility model; Figure 9 This is a three-dimensional structural diagram of the workpiece in the positioning groove state during machining, according to this utility model. Figure 10 This is a three-dimensional structural view of the workpiece under the side window state during machining, according to this utility model. Figure 11 This is a three-dimensional structural diagram of the workpiece in the state of machining side holes according to this utility model; Explanation of reference numerals in the attached drawings: 1. Fixed base; 11. Workpiece; 2. First clamping unit; 21. First working position; 22. First auxiliary positioning part; 23. Second auxiliary positioning part; 24. Third auxiliary positioning part; 25. Displacement floating part; 26. Pressure plate; 3. Second clamping unit; 31. Second working position; 32. Auxiliary limiting bar; 33. Floating support part; 34. Point pressing part; 4. Third clamping unit; 41. Third working position; 42. Auxiliary positioning column; 43. Support plate. Detailed Implementation
[0016] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.
[0017] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.
[0018] Please see Figure 1-11 The present invention provides the following technical solution: Example 1: In order to solve the problems in the existing processing of irregularly shaped castings, such as the need for sequential processing on multiple machine tools, the easy occurrence of inconsistent positioning references and accumulated clamping errors during product transfer, and the poor connection between multiple processes leading to reduced processing accuracy and reduced production efficiency.
[0019] The clamping device for machining irregularly shaped castings includes a fixed base 1, a first clamping unit 2, a second clamping unit 3, and a third clamping unit 4. The first clamping unit 2 is mounted on the fixed base 1 and is used to position and clamp the product to form a multi-directional positioning reference for the product. The second clamping unit 3 is mounted on the fixed base 1 and located beside the first clamping unit 2. The second clamping unit 3 is used to support and clamp the thin-walled part of the product based on the positioning reference formed by the first clamping unit 2 to suppress vibration and deformation during side machining of the product. The third clamping unit 4 is mounted on the fixed base 1 and located beside the second clamping unit 3. The third clamping unit 4 is used to connect the machining process of the second clamping unit 3 to enable the product to complete multiple machining processes on the same machining equipment and reduce manual clamping errors and multi-process connection errors.
[0020] In this embodiment, the first clamping unit 2 first forms a reference through positioning and clamping processing, laying a unified reference foundation for subsequent processes, overcoming the positioning deviation problem caused by the dispersion of traditional references, and.
[0021] The second clamping unit 3 provides targeted support and clamping for the thin-walled portion based on this benchmark, effectively suppressing processing vibration and deformation, and solving the industry problem of difficult tolerance control in the processing of thin-walled irregular castings.
[0022] The third clamping unit 4 further connects with the preceding processes, enabling multi-process machining on the same machine based on a unified benchmark. This avoids manual clamping errors and overcomes the shortcomings of poor process connection and error accumulation in traditional multi-machine processing. Through the coordinated operation of the first clamping unit 2, the second clamping unit 3, and the third clamping unit 4, the positioning of irregularly shaped castings is achieved, ensuring that the product is processed on a single machine tool. This effectively prevents poor connection caused by multiple processes and reduces clamping errors.
[0023] See Figure 3 and Figure 4 The first clamping unit 2 includes a first working position 21, a first auxiliary positioning part 22, and a second auxiliary positioning part 23. The first working position 21 is disposed on the top of the fixed base 1 and is used to process the positioning groove of the workpiece 11 to be processed. The first auxiliary positioning part 22 has a pair and is disposed on the top of the first working position 21 respectively, and the pair of first auxiliary positioning parts 22 is used to abut against the two sides of the workpiece 11 to be processed. The second auxiliary positioning part 23 is disposed on the top of the first working position 21 and is located between the pair of first auxiliary positioning parts 22, and the second auxiliary positioning part 23 is used to abut against the upper end surface of the workpiece 11 to be processed.
[0024] In this embodiment, the top of the first auxiliary positioning part 22 is an L-shaped structure. When the workpiece 11 to be processed is placed on the first auxiliary positioning part 22, the upper end face of the workpiece 11 can be in contact with the end face of the second auxiliary positioning part 23 in this state.
[0025] See Figure 3 and Figure 4 The first clamping unit 2 also includes a third auxiliary positioning part 24; the third auxiliary positioning part 24 is disposed at the top of the first working position 21, and the side of the third auxiliary positioning part 24 is used to abut against the lower end surface of the workpiece 11 to be processed.
[0026] The third auxiliary positioning part 24 is used to abut against the lower end face of the workpiece 11 to be processed. In this embodiment, the third auxiliary positioning part 24 is a cylindrical conical structure. The cylindrical conical structure is used to abut against the bottom end face of the workpiece 11 to achieve multi-face clamping of the workpiece 11 and ensure stable clamping of the workpiece 11.
[0027] See Figure 3 and Figure 4 The first clamping unit 2 also includes a displacement floating part 25 and a pressure plate 26; the displacement floating part 25 is slidably disposed on the fixed base 1, and the displacement floating part 25 is located in the middle of a pair of first auxiliary positioning parts 22 and on the side of the second auxiliary positioning part 23; the pressure plate 26 is disposed at the bottom of the displacement floating part 25, and the pressure plate 26 is used to abut against the inner side of the workpiece 11 to be processed.
[0028] In this embodiment, the positions of the first auxiliary positioning part 22, the second auxiliary positioning part 23, the third auxiliary positioning part 24, and the pressure plate 26 constitute clamping contacts for respectively holding the left and right, upper and lower ends, and inner side of the workpiece 11 to be processed, wherein the inner clamping contact is an internal support type fixation. In this embodiment, a hydraulic cylinder for driving the displacement floating part 25 to move is provided at the top of the first working position 21. When the hydraulic cylinder is activated, it can drive the displacement floating part 25 and the pressure plate 26 to press down and fix the workpiece 11. The bottom of the displacement floating part 25 is connected to the center position of the pressure plate 26, which can ensure that the pressure plate 26 is centered under force and can ensure stable fixation of the inner side of the workpiece 11 to be processed. In this embodiment, the workpiece 11 to be processed is clamped in the position of the first clamping unit 2, and in this state, two positioning grooves are machined on the top of the workpiece 11 to be processed.
[0029] Example 2: In order to solve the problem of product deformation and tolerance accumulation caused by uneven clamping position and clamping surface when processing the side window of workpiece 11.
[0030] See Figure 5 and Figure 6 The second clamping unit 3 includes a second working position 31 and an auxiliary limiting bar 32. The second working position 31 is located on the top of the fixed base 1 and on the side of the first clamping unit 2. There is a pair of auxiliary limiting bars 32, which are respectively located on the first working position 21, and both of the auxiliary limiting bars 32 are used to abut the top of the processed workpiece 11.
[0031] In this embodiment, the second working position 31 is used to process the side window of the workpiece 11 in the positioning and clamping state. The auxiliary limiting bar 32 can be used to abut against the two end faces on both sides of the top of the workpiece 11 to be processed, to prevent the workpiece 11 from moving backward during the side window processing.
[0032] See Figure 5 and Figure 6 The second clamping unit 3 also includes a floating support part 33 and a pressing part 34; the floating support part 33 has a pair and is respectively arranged on both sides of the first working position 21, and both of the first floating support parts 33 are used to abut against both sides of the workpiece 11 after processing the positioning groove.
[0033] In this embodiment, the floating support 33 is preferably a floating support cylinder with a built-in elastic hydraulic system to achieve floating support. It can automatically adapt to the surface contour of the workpiece 11 and prevent thin-walled vibration during processing. The floating support itself can automatically adjust according to the product's shape differences. The point pressure part 34 is a contact limiting block. In this embodiment, the auxiliary limiting bar 32, the floating support 33, and the point pressure part 34 constitute a three-point abutment and fixing structure for abutting the side window of the workpiece 11 during processing. This solves the problem that traditional fixtures require frequent changes of workstations when processing the side window of the workpiece 11, and also cause the workpiece 11 to shift backward and wobble on both sides during processing. It reduces the accumulation of tolerances caused by product deformation and avoids manual clamping errors.
[0034] See Figure 7 and Figure 8 The third clamping unit 4 includes a third working position 41, auxiliary positioning posts 42 and support plates 43; the third working position 41 is located on the top of the fixed base 1; there are multiple auxiliary positioning posts 42 and they are respectively located on the outside of the third working position 41; there are multiple support plates 43 and they are respectively installed on the third working position 41; there are multiple support plates 43 and they are respectively rotatably located on the third working position 41.
[0035] In this embodiment, the third working position 41 is used to machine the side holes of the workpiece 11 in a positioning and clamping state. In this embodiment, the third working position 41 is equipped with multiple clamping cylinders for driving the support plates 43 to clamp the outer side of the workpiece 11. When the clamping cylinders are activated, they can drive the multiple support plates 43 to abut against the outer side of the workpiece 11 in a fixed state. The auxiliary positioning pins 42 and the support plates 43 constitute multiple outer abutment surfaces for clamping the workpiece 11, reducing clamping errors.
[0036] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.
Claims
1. A clamping device for machining irregularly shaped castings, comprising a fixed base (1), characterized in that: The clamping device for machining irregularly shaped castings also includes a first clamping unit (2), a second clamping unit (3), and a third clamping unit (4); The first clamping unit (2) is mounted on the fixed base (1); The first clamping unit (2) is used to position and clamp the product in order to form a multi-directional positioning reference for the product. The first clamping unit (2) includes a first working position (21), a first auxiliary positioning part (22), and a second auxiliary positioning part (23); the first working position (21) is disposed on the top of the fixed base (1) and is used to process the positioning groove of the workpiece (11) to be processed; the first auxiliary positioning part (22) has a pair and is disposed on the top of the first working position (21), and the pair of first auxiliary positioning parts (22) is used to abut against the two sides of the workpiece (11) to be processed; the second auxiliary positioning part (23) is disposed on the top of the first working position (21), and the second auxiliary positioning part (23) is located between the pair of first auxiliary positioning parts (22), and the second auxiliary positioning part (23) is used to abut against the upper end surface of the workpiece (11) to be processed; The second clamping unit (3) is mounted on the fixed base (1) and located next to the first clamping unit (2); The second clamping unit (3) is used to support the thin-walled part of the product and clamp the product based on the positioning reference formed by the first clamping unit (2) to suppress vibration and deformation during the processing of the side of the product. The second clamping unit (3) includes a second working position (31) and an auxiliary limiting bar (32); the second working position (31) is located on the top of the fixed base (1) and on the side of the first clamping unit (2); there is a pair of auxiliary limiting bars (32) and they are respectively located on the first working position (21), and both of the auxiliary limiting bars (32) are used to abut the top of the processed workpiece (11); The third clamping unit (4) is mounted on the fixed base (1) and located next to the second clamping unit (3); The third clamping unit (4) is used to connect the processing of the second clamping unit (3) so as to realize the product to complete multiple processing steps on the same processing equipment and reduce manual clamping error and multi-process connection error.
2. The clamping device for machining irregularly shaped castings according to claim 1, characterized in that: The first clamping unit (2) also includes a third auxiliary positioning part (24); the third auxiliary positioning part (24) is disposed on the top of the first working position (21), and the side of the third auxiliary positioning part (24) is used to abut against the lower end face of the workpiece (11) to be processed.
3. The clamping device for machining irregularly shaped castings according to claim 2, characterized in that: The first clamping unit (2) also includes a displacement floating part (25) and a pressure plate (26); the displacement floating part (25) is slidably disposed on the fixed seat (1), and the displacement floating part (25) is located in the middle of a pair of first auxiliary positioning parts (22) and on the side of the second auxiliary positioning part (23); the pressure plate (26) is disposed at the bottom of the displacement floating part (25), and the pressure plate (26) is used to abut against the inner side of the workpiece (11) to be processed.
4. The clamping device for machining irregularly shaped castings according to claim 1, characterized in that: The second clamping unit (3) also includes a floating support part (33) and a pressing part (34); the floating support part (33) has a pair and is respectively arranged on both sides of the first working position (21), and the pair of first floating support parts (33) are used to abut against both sides of the workpiece (11) after machining the positioning groove.
5. The clamping device for machining irregularly shaped castings according to claim 1, characterized in that: The third clamping unit (4) includes a third working position (41), an auxiliary positioning column (42), and a support plate (43); the third working position (41) is located on the top of the fixed base (1); there are multiple auxiliary positioning columns (42) and they are respectively located on the outside of the third working position (41); there are multiple support plates (43) and they are respectively installed on the third working position (41); there are multiple support plates (43) and they are respectively rotatably located on the third working position (41).