An inner pressure tool for processing a special-shaped frame

Abstract

The utility model relates to a kind of inner pressure tool for special-shaped frame machining in the technical field of special-shaped part processing, including cushioning block, installation base plate, press block and compression bolt, installation base plate is located in the cushioning block top surface, its two sides extend outward;The outer edge of installation base plate top surface is equipped with positioning ring groove, the positioning ring groove has radial positioning ring surface and axial positioning plane, the chute groove bottom is equipped with vertical through waist-shaped hole along its length direction;The utility model is designed by being equipped with the positioning ring groove with radial positioning ring surface and axial positioning plane, and by compression bolt from below through waist-shaped hole and screw connection in press block, by screwing bolt, downward tension is generated, so that press block firmly presses down workpiece, compared with upper compression device in the prior art, the inner pressure tool saves clamping space, facilitate tool path planning, especially suitable for complex structure or space limited special-shaped frame workpiece.

Description

Technical Field

[0001] This utility model relates to the field of irregular part processing technology, and in particular to an internal pressure tooling for processing irregular frames. Background Technology

[0002] In the field of machining, the application of irregularly shaped frame parts (such as thin-walled frames, ring parts, and irregular contour support parts in aerospace and automotive manufacturing) is becoming increasingly widespread. These parts are typically characterized by complex structures, low rigidity, and easy deformation, posing a severe challenge to clamping and positioning during their machining process.

[0003] Currently, the following two methods are commonly used for machining and clamping such irregularly shaped frame workpieces: External clamping fixture: This type of fixture clamps the workpiece from the outside using circumferentially distributed clamping plates and bolts. This method has significant drawbacks: the clamping force acts on the outer edge of the workpiece, which can easily cause deformation for thin-walled or poorly rigid workpieces, affecting machining accuracy; simultaneously, the external clamping plate and bolt mechanism often occupies a large amount of space, interferes with the tool path, and limits machining efficiency and applicability.

[0004] Simple internal support or positioning table with universal clamping tools: An internal positioning table is used in conjunction with independent clamping blocks, C-clamps, and other universal tools for clamping. While this method avoids interference with the workpiece's shape to some extent, it suffers from low clamping efficiency and inconsistent clamping force. More importantly, after processing, the workpiece often forms a tight fit with the positioning table, making unloading difficult. When uneven force on the workpiece causes it to "jam" at a certain position, it can even lead to workpiece deformation.

[0005] To address this, we designed an internal pressure tooling for machining irregularly shaped frames. Utility Model Content

[0006] In order to overcome the shortcomings of the prior art, this utility model discloses an internal pressure tooling for processing irregular frames.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: An internal pressure fixture for machining irregularly shaped frames includes: Elevating blocks: A mounting base plate is disposed on the top surface of the raised block, with its two sides extending outwards; a positioning ring groove is formed on the outer edge of the top surface of the mounting base plate, the positioning ring groove having a radial positioning ring surface and an axial positioning plane, which are used for radial and axial positioning of the workpiece, respectively; a sliding groove is provided on the top surface of both sides of the mounting base plate, and a vertical through-hole is provided at the bottom of the sliding groove along its length. The pressure block has its lower end movably fitted into the sliding groove to facilitate movement toward or away from the positioning ring groove; the top of the end of the pressure block near the positioning ring groove has an outwardly extending pressing part; the pressure block also has a threaded hole corresponding to the waist-shaped hole; The clamping bolt has its screw threaded through the oblong hole and screwed into the threaded hole, and is used to pull down the pressure block to clamp the workpiece.

[0008] Furthermore, a positioning and fitting structure is provided between the bottom surface of the pressing block and the bottom surface of the sliding groove for initial positioning of the pressing block.

[0009] Furthermore, the bottom surface of the positioning ring groove is uniformly provided with multiple guide holes.

[0010] Furthermore, it also includes a feeding assembly, the feeding assembly comprising: Multiple sliding push rods slide through the guide holes one by one; A driving component, connected to the lower end of the sliding push rod, is used to push the sliding push rod upward to lift the workpiece out of the positioning ring groove.

[0011] Furthermore, the raised block has a weight-reducing cavity in the middle.

[0012] Furthermore, the feeding assembly also includes: A square frame is fitted around the raised block and connected to the lower ends of all sliding top rods; The connecting rod extends horizontally through the weight-reducing cavity, and both ends are connected to the square frame; The driving component is a telescopic device, and its telescopic shaft is connected to the connecting rod.

[0013] Furthermore, the axial positioning plane is provided with a matching pad plate.

[0014] Compared with the prior art, the beneficial effects of this utility model are: 1. By setting a positioning ring groove with a radial positioning ring surface and an axial positioning plane, the workpiece is accurately positioned radially and axially, ensuring the stability of the workpiece position during processing and improving processing accuracy. The design of the clamping bolt passing through the waist-shaped hole from below and screwed to the clamping block generates a downward pulling force by tightening the bolt, so that the clamping block firmly presses down on the workpiece. Compared with the upper clamping device in the prior art, this internal clamping fixture saves clamping space and facilitates tool path planning. It is especially suitable for irregular frame workpieces with complex structure or limited space. 2. A protrusion-groove mating structure is provided between the bottom surface of the pressure block and the slide groove, which can preliminarily position the pressure block before pressing, prevent the pressure block from moving backward or tilting during the pressing process, and further improve the pressing reliability and repeat clamping accuracy. 3. The sliding push rod in the unloading assembly rises synchronously in the guide hole, which can smoothly lift the workpiece and avoid workpiece deformation or surface damage caused by manual prying. It is especially suitable for thin-walled or easily deformable irregular frame parts. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the first structure of this utility model; Figure 2 This is a top view of the first structure of this utility model; Figure 3 for Figure 2 Schematic diagram of AA section; Figure 4 This is a schematic diagram of the second structure of this utility model; Figure 5 This is a cross-sectional view of the second structure of this utility model; Figure 6 This is a partial cross-sectional view of the second structure of this utility model; Figure 7 This is a schematic diagram of the feeding assembly in this utility model.

[0016] In the diagram: 1. Elevating block; 11. Weight reduction cavity; 2. Mounting base plate; 21. Positioning ring groove; 211. Radial positioning ring surface; 212. Axial positioning plane; 22. Slide groove; 23. Waist-shaped hole; 24. Guide hole; 3. Pressure block; 31. Pressing part; 32. Threaded hole; 4. Clamping bolt; 5. Material feeding assembly; 51. Sliding top rod; 52. Driving component; 53. Square frame; 54. Connecting rod; 6. Pad plate. Detailed Implementation

[0017] The present invention will be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if terms such as "upper", "lower", "front", "rear", "left", "right" indicate orientation or positional relationship, they are only corresponding to the drawings of this application for the convenience of describing the present invention. It should be understood that if terms such as "end", "side", "end portion", "side part", "lateral", "longitudinal", etc. indicate orientation or positional relationship, they are only corresponding to the length and width of the corresponding component. That is, "end" indicates the head and tail area in the length direction of the corresponding component, and "side part" indicates the head and tail area in the width direction of the corresponding component. They are used for the convenience of describing the present invention and do not indicate or imply that the device or element referred to must have a specific orientation.

[0018] Example 1, in conjunction with Appendix Figure 1-3 An internal pressure fixture for processing irregularly shaped frames includes a shim block 1, a mounting base plate 2, a pressure block 3, and a clamping bolt 4.

[0019] The shim block 1 is a rectangular block whose function is to provide support for the entire tooling and ensure a suitable working height. Specifically, the height of the shim block 1 is designed according to the needs and is not specifically limited here.

[0020] Mounting base plate 2 is fixedly mounted on the top surface of the shim block 1, with both sides extending outwards. A positioning ring groove 21 is machined around the outer edge of the top surface of mounting base plate 2. The inner sidewall of the positioning ring groove 21 forms a radial positioning ring surface 211 for radially limiting the workpiece, and the bottom surface of the groove forms an axial positioning plane 212 for axially positioning the workpiece.

[0021] Multiple grooves 22 are provided on the top surface of the extended portions on both sides of the mounting base 2. Each groove 22 has a waist-shaped hole 23 that penetrates vertically through the mounting base 2 along its length.

[0022] Specifically, the central axis of the slide groove 22 along its length is designed to form a large angle with the radial positioning ring surface 211 of the positioning ring groove 21, which is 80-90°. Preferably, it is 90°, that is, the central axis of the slide groove 22 along its length is perpendicular to the radial positioning ring surface 211 of the nearest position.

[0023] The lower end of the pressure block 3 is slidably placed within the slide groove 22, allowing the pressure block 3 to move along the length of the slide groove 22 to approach or move away from the positioning ring groove 21. The end of the pressure block 3 facing the positioning ring groove 21 has an outwardly extending horizontally pressing portion 31 for pressing the workpiece. That is, when the pressure block 3 approaches the positioning ring groove 21 to its limit position along the length of the slide groove 22, the pressing portion 31 can extend above the positioning ring groove 21 to press the workpiece; when the pressure block 3 moves away from the positioning ring groove 21 to its limit position along the length of the slide groove 22, the pressing portion 31 can disengage from above the positioning ring groove 21, at which point it does not affect the loading and unloading of the workpiece.

[0024] The pressure block 3 is also machined with a vertical threaded hole 32, the position of which corresponds to the waist-shaped hole 23 at the bottom of the slide groove 22.

[0025] The screw of the clamping bolt 4 passes through the oblong hole 23 from the bottom to the top of the mounting base 2 and finally screws into the threaded hole 32 of the clamping block 3. That is, when the clamping bolt 4 is tightened, its bolt head will abut against the bottom surface of the mounting base 2, thereby generating a downward pulling force, pulling the clamping block 3 downward, and then firmly pressing the workpiece in the positioning ring groove 21 through the pressing part 31.

[0026] The waist-shaped hole 23 provides adjustment space for the horizontal movement of the pressure block 3.

[0027] To further ensure the stability of the pressure block 3 during movement and initial positioning, a positioning fit structure is provided between the bottom surface of the pressure block 3 and the bottom surface of the groove 22. Combined with... Figure 6As shown, the positioning and mating structure can be a protrusion on the bottom surface of the pressure block 3 and a corresponding groove on the bottom surface of the slide groove 22, forming a locking structure. That is, after the pressure block 3 approaches the positioning ring groove 21 to its limit position along the length direction of the slide groove 22, the groove and the protrusion provide a preliminary positioning effect for the pressure block 3 under the action of gravity, which facilitates the quick adjustment of the pressure block position and improves the clamping efficiency; and it can also prevent the pressure block 3 from moving backward during the tightening of the clamping bolt 4.

[0028] As needed, the sides of the shim block 1 near the lower end may be provided with grooves or the lower end may be provided with an extension, so that the shim block 1 can be pressed into place.

[0029] Example 2, in conjunction with Appendix Figure 4-7 An internal pressure tooling for processing irregularly shaped frames is provided. Based on Embodiment 1, this internal pressure tooling can adapt well to the blanking of thin-walled structures and irregularly shaped frame workpieces of different thicknesses, and prevents deformation during the blanking process.

[0030] In this embodiment, a matching pad plate 6 is laid on the axial positioning plane 212.

[0031] Specifically, at least part of the outer edge of the pad plate 6 extends out of the axial positioning plane 212. That is, during material feeding, the pad plate 6 can be lifted upward through the protruding part of the pad plate 6, so that the workpiece is evenly stressed and moves upward to get away from the constraint of the radial positioning ring surface 211, thereby achieving the function of assisting material feeding.

[0032] Example 3, in conjunction with Appendix Figure 4-7 An internal pressure tooling for processing irregular frames is provided. In this embodiment, based on embodiment one or two, a material unloading component 5 is added to facilitate unloading of the workpiece after processing, and the shim block 1 is optimized.

[0033] Specifically, multiple vertical guide holes 24 are evenly distributed on the bottom plane of the positioning ring groove 21; a weight reduction cavity 11 is opened in the middle of the shim block 1.

[0034] The feeding assembly 5 includes multiple sliding push rods 51, a driving component 52, a square frame 53, and a connecting rod 54. The multiple sliding push rods 51 correspond one-to-one with multiple guide holes 24 and can slide up and down through the guide holes 24.

[0035] The lower ends of all sliding push rods 51 are fixedly connected to the square frame 53. A connecting rod 54 passes horizontally through the weight-reducing cavity 11, with both ends fixedly connected to the square frame 53. The driving component 52 is a conventional telescopic device (such as a cylinder, hydraulic cylinder, or electric push rod) installed inside the weight-reducing cavity 11, with its telescopic shaft connected to the middle of the connecting rod 54. When the driving component 52 extends, it can drive all sliding push rods 51 to rise synchronously through the connecting rod 54 and the square frame 53, thereby smoothly lifting the processed workpiece and disengaging it from the positioning ring groove 21, achieving automatic unloading with safe and convenient operation.

[0036] When this embodiment is implemented based on embodiment two, the outer edge of the pad plate 6 may not extend outward to the axial positioning plane 212.

[0037] The parts of this utility model not described in detail are prior art. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the above embodiments should be regarded as exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended to include all changes that fall within the meaning and scope of the equivalents of the claims in this utility model, and no reference numerals in the claims should be regarded as limiting the content of the claims.

Claims

1. An internal pressure fixture for machining irregularly shaped frames, characterized in that, include: Elevating block (1): Mounting base plate (2) is provided on the top surface of the shim block (1) and extends outward on both sides; a positioning ring groove (21) is provided on the outer edge of the top surface of the mounting base plate (2), the positioning ring groove (21) has a radial positioning ring surface (211) and an axial positioning plane (212), which are used for radial and axial positioning of the workpiece, respectively; the top surface of both sides of the mounting base plate (2) is provided with a sliding groove (22), and the bottom of the sliding groove (22) has a vertical through waist-shaped hole (23) along its length direction. The lower end of the pressure block (3) is movably fitted into the slide groove (22) so as to move towards or away from the positioning ring groove (21); the top of the end of the pressure block (3) near the positioning ring groove (21) is provided with an outwardly extending pressing part (31); the pressure block (3) is also provided with a threaded hole (32) corresponding to the waist-shaped hole (23). The clamping bolt (4) has its screw moving through the waist-shaped hole (23) and screwed into the threaded hole (32) for pulling down the pressure block (3) to clamp the workpiece.

2. The internal pressure fixture for machining irregularly shaped frames according to claim 1, characterized in that: A positioning and fitting structure is provided between the bottom surface of the pressure block (3) and the bottom surface of the groove (22) for preliminary positioning of the pressure block (3).

3. The internal pressure fixture for machining irregularly shaped frames according to claim 1, characterized in that: The bottom surface of the positioning ring groove (21) is provided with multiple guide holes (24).

4. The internal pressure fixture for machining irregularly shaped frames according to claim 3, characterized in that: It also includes a feeding assembly (5), which includes: Multiple sliding push rods (51) slide through the guide hole (24) one by one. The driving component (52) is connected to the lower end of the sliding top rod (51) and is used to push the sliding top rod (51) upward to lift the workpiece away from the positioning ring groove (21).

5. The internal pressure fixture for machining irregularly shaped frames according to claim 4, characterized in that: The raised block (1) has a weight-reducing cavity (11) in the middle.

6. The internal pressure fixture for machining irregularly shaped frames according to claim 5, characterized in that: The feeding assembly (5) also includes: A square frame (53) is fitted around the raised block (1) and connected to the lower end of all sliding top rods (51); The connecting rod (54) extends horizontally through the weight-reducing cavity (11), and both ends are connected to the square frame (53). The drive component (52) is a telescopic device, and its telescopic shaft is connected to the connecting rod (54).

7. An internal pressure fixture for machining irregularly shaped frames according to any one of claims 1-6, characterized in that: The axial positioning plane (212) is provided with a matching pad plate (6).

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