CN217860026U - Machining tool for curved surface special-shaped parts - Google Patents

Abstract

A machining tooling for special-shaped curved parts, including a single-side positioning assembly, the single-side positioning assembly includes a lower positioning body and an upper positioning block pressing plate, the upper side of the lower positioning body is provided with a first arc-shaped positioning groove, and the upper positioning block pressing plate A second arc-shaped positioning groove is provided on the lower side of the bottom surface, and the first arc-shaped positioning groove and the second arc-shaped positioning groove can form an assembly hole matching the surface shape of the curved surface special-shaped part to be processed. The utility model can complete the process of removing the process chuck at both ends of the part, the special-shaped groove of the part and the oblique hole of the part in one clamping, effectively improving the processing efficiency and avoiding the influence of the secondary clamping on the processing accuracy. The utility model can be machined for curved surface parts with different lengths, and the clamping position can be adjusted according to the position of the detail structure of the special-shaped parts, which increases the flexibility of processing and expands the applicability of the tooling. The utility model has a simple and reasonable structural design, is convenient to use, and can realize stable clamping of curved surface special-shaped parts to be processed.

Description

Machining tooling for curved surface special-shaped parts

technical field

The utility model belongs to the technical field of special-shaped workpiece processing equipment, and more specifically relates to a machining tool for curved surface special-shaped parts.

Background technique

Due to its complex structure and asymmetry, curved surface special-shaped parts are difficult to process.

In the prior art, during the processing of curved surface special-shaped parts, after the surface milling operation of the curved surface special-shaped parts is completed, it is necessary to remove the clamping chucks left at both ends of the parts (the clamping chucks are reserved structures for curved surface special-shaped parts , used to connect and fix with the processing tooling), which leads to the problem of more processing procedures for curved surface special-shaped parts. In addition, for the clamping of curved surface special-shaped parts, there are still problems such as difficult determination of support points and difficult positioning. Especially in the subsequent detailed structure processing, multiple clamping is likely to affect the processing efficiency and processing accuracy.

Utility model content

(1) Technical issues

To sum up, how to provide a mechanical processing tool suitable for the processing of curved surface special-shaped parts, to reduce the number of clamping and fixing of curved surface special-shaped parts, and to improve the processing efficiency of curved surface special-shaped parts has become an urgent problem to be solved by those skilled in the art question.

(2) Technical solutions

The utility model provides a machining tool for curved surface special-shaped parts. In the utility model, the machining tool for curved surface special-shaped parts includes a single-side positioning assembly, and the single-side positioning assembly includes a lower positioning body and an upper positioning block. Pressing plate, the upper side of the lower positioning body is in contact with the lower side of the upper positioning block pressing plate, the upper side of the lower positioning body is provided with a first arc-shaped positioning groove, and the lower side of the upper positioning block pressing plate is set There is a second arc-shaped positioning groove, and the first arc-shaped positioning groove and the second arc-shaped positioning groove can form an assembly hole that matches the surface shape of the curved surface special-shaped part to be processed;

There are at least two unilateral positioning assemblies, the at least two unilateral positioning assemblies are arranged at intervals, and the assembly holes of the at least two unilateral positioning assemblies are coaxial.

Preferably, in the machining tool for curved surface special-shaped parts provided by the present invention, the lower positioning body and the upper positioning block pressing plate are positioned through positioning pins.

Preferably, in the machining tooling for curved surface special-shaped parts provided by the utility model, a first positioning hole is provided on the upper side of the lower positioning body, and a second positioning hole is provided on the pressing plate of the upper positioning block, so that The second positioning hole is arranged opposite to the first positioning hole, and the positioning pin can be inserted into the second positioning hole and fitted with the first positioning hole.

Preferably, in the machining tooling for curved surface special-shaped parts provided by the utility model, a detection hole is vertically provided on the upper side of the upper positioning block pressing plate and corresponding to the second arc-shaped positioning groove, through the detection The hole is equipped with a detection dial indicator capable of positioning and measuring the curved surface special-shaped part to be processed in the assembly hole.

Preferably, in the machining tool for curved surface special-shaped parts provided by the present invention, the lower positioning body is a plate structure, and the upper positioning block pressing plate is a plate structure.

Preferably, in the machining tooling for curved surface special-shaped parts provided by the utility model, a relief groove is provided on the front and rear end surfaces of the lower positioning body along the horizontal direction; a fixing assembly is matched with the relief groove, The fixing assembly includes bolts that are slidably engaged with the table top of the machine tool, and a pressure plate is installed through the bolts, and one end of the pressure plate is locked in the relief groove.

Preferably, in the machining tooling for curved surface special-shaped parts provided by the utility model, an adjustable support is provided on the underside of the other end of the press plate, and the adjustable support is press-fitted on the joint between the press plate and the machine tool table. between the tabletops; and, the adjustable support and the lower positioning body are separately arranged on both sides of the bolt.

Preferably, in the machining tooling for curved surface special-shaped parts provided by the present invention, a circular hole structure is provided on the lower positioning body, and a hole structure is provided through the circular hole structure to realize the spacing between the lower positioning bodies. Adjustment worm for distance adjustment.

Preferably, in the machining tool for curved surface special-shaped parts provided by the present invention, a worm gear screw pair is provided at the end of the adjusting worm, and the worm gear screw pair can abut against the outer surface of the lower positioning body.

Preferably, in the machining tool for curved surface special-shaped parts provided by the present invention, the upper side of the lower positioning body is a plane, and at least two first arc-shaped positioning grooves are arranged on the lower positioning body; The lower side of the upper positioning block pressing plate is a plane, and the upper positioning block pressing plate is provided with at least two of the second arc-shaped positioning grooves, and the second arc-shaped positioning grooves are connected with the first arc-shaped positioning grooves. One-to-one correspondence settings.

(3) Beneficial effects

The utility model provides a machining tool for curved surface special-shaped parts, the machining tool for curved surface special-shaped parts includes a single-side positioning assembly, the single-side positioning assembly includes a lower positioning body, an upper positioning block pressing plate, and an upper side of the lower positioning body Cooperate with the lower side of the upper positioning block pressing plate, the upper side of the lower positioning body is provided with a first arc-shaped positioning groove, the lower side of the upper positioning block pressing plate is provided with a second arc-shaped positioning groove, the first arc-shaped positioning groove and the second arc-shaped positioning groove The two-arc positioning groove can be formed with an assembly hole matching the surface shape of the curved surface special-shaped part to be processed; at least two unilateral positioning components are provided, at least two unilateral positioning components are arranged at intervals, and at least two unilateral positioning components are assembled The holes are coaxial.

Through the above-mentioned structural design, the machining tooling for curved surface special-shaped parts provided by the utility model can treat the main part of the curved surface special-shaped parts (if the curved surface special-shaped parts to be processed are rods, then the shaft part of the curved surface special-shaped parts can be processed) Clamping is carried out, so that the curved surface and special-shaped parts to be processed can be stably and reliably assembled on the machine tool for processing. The utility model can complete the process of removing the process chuck at both ends of the part, the special-shaped groove of the part and the oblique hole of the part under one clamping of the curved surface special-shaped part to be processed, effectively improving the processing efficiency and avoiding the influence of the secondary clamping on the processing accuracy. The machining tooling for curved surface special-shaped parts provided by the utility model can be machined for curved surface parts of different lengths, and the clamping position is adjusted according to the position of the detailed structure of the special-shaped parts, which increases the flexibility of processing and expands the tooling. applicability. The utility model has a simple and reasonable structural design, is convenient to use, and can realize stable clamping of curved surface special-shaped parts to be processed.

Description of drawings

Fig. 1 is a schematic structural view of a single-side positioning assembly in an embodiment of the present invention;

Fig. 2 is the schematic diagram of the structure of curved surface special-shaped parts in the embodiment of the present invention when the curved surface special-shaped parts to be processed are clamped by machining tooling;

Fig. 3 is a structural schematic diagram of a curved surface special-shaped part to be processed in an embodiment of the utility model.

In Figures 1 to 3, the corresponding relationship between component names and reference signs is:

1-Machine workbench, 2-T-slot, 3-Lower positioning body, 4-Give way slot, 5-Screw, 6-Adjustable support, 7-Clamping plate, 8-Threaded slider, 9-Clamping plate of upper positioning block , 10-location pin, 11-assembly hole, 12-worm wheel screw pair, 13-worm, 14-detection positioning hole, 15-detection dial indicator, 16-parts, 17-process chuck, 18-parts special-shaped groove, 19-Part oblique hole.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present utility model clearer, the implementation of the present utility model will be further described in detail below in conjunction with the accompanying drawings.

In addition, in the description of the present invention, the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal" ", "top", "bottom" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the utility model rather than requiring that the utility model must be constructed and operated in a specific orientation , so it cannot be interpreted as a limitation of the present utility model. The terms "connected" and "connected" used in the utility model should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be directly connected or indirectly connected through an intermediate component. Those of ordinary skill can understand the specific meanings of the above terms according to specific situations.

Please refer to Fig. 1 to Fig. 3, among them, Fig. 1 is the structural diagram of one-side positioning assembly in the utility model embodiment; Fig. 2 is the curved surface special-shaped part in the utility model embodiment with the machining tooling clamping to be processed curved surface special-shaped part Fig. 3 is a schematic structural view of a curved surface special-shaped part to be processed in an embodiment of the present invention.

The utility model provides a machining tool for curved surface special-shaped parts. In the utility model, the machining tool for curved surface special-shaped parts includes a single-side positioning component. In the prior art, the curved surface special-shaped part 16 is usually a rod, and on a section perpendicular to the axis of the rod (the length direction of the rod), the curved surface special-shaped part 16 has an irregular curved surface structure. For example, in one embodiment of the present invention, the cross section of the curved surface special-shaped part 16 to be processed is similar to a water drop shape. At the same time, grooves and hole structures will be processed on the surface (curved surface) of the curved surface special-shaped part 16, such as part special-shaped groove 18, part inclined hole 19, etc., and the two ends of the curved surface special-shaped part 16 are also provided with structures such as process chucks 17 .

The machining tooling for curved surface special-shaped parts provided by the utility model includes a single-side positioning assembly, at least two single-side positioning assemblies are provided, at least two single-side positioning assemblies are arranged at intervals, and at least two assembly holes of the single-side positioning assembly (Assembly hole is a hole structure on one side positioning component) coaxial. The single-side positioning assembly usually clamps the two ends of the curved surface special-shaped part 16 during actual use. Of course, for the long curved surface special-shaped part 16, the single-side positioning assembly can also support the middle part of the curved surface special-shaped part 16 ( The hole and groove structure of curved surface special-shaped parts 16 must not be affected).

For unilateral positioning components, the specific structure is as follows:

The one-side positioning assembly includes a lower positioning body 3 and an upper positioning block pressing plate 9 . The lower positioning body 3 is a plate structure with a certain thickness. As shown in Figure 1, the lower positioning body 3 is similar to a rectangular plate structure. Axial.

For the convenience of structural description, taking FIG. 1 as an example, the upper and lower surfaces of the lower positioning body 3 are the upper side and the lower side, and the left and right sides are two end surfaces.

The upper side of the lower positioning body 3 is in contact with the lower side of the upper positioning block pressing plate 9 (the upper side of the lower positioning body 3 is a plane structure, and the lower side of the upper positioning block pressing plate 9 is a plane structure), and the lower positioning body 3 and the upper positioning The flat contact between the block pressing plates 9 can improve the stability of the contact between the lower positioning body 3 and the upper positioning block pressing plate 9 .

The utility model is provided with a first arc-shaped positioning groove on the upper side of the lower positioning body 3 (designed according to the cross-sectional shape of the curved surface special-shaped part 16 to be processed), and the lower side of the upper positioning block pressing plate 9 is provided with a second arc-shaped positioning groove (Design according to the cross-sectional shape of the curved surface special-shaped part 16 to be processed), after the lower positioning body 3 and the upper positioning block pressing plate 9 are assembled together, the first arc-shaped positioning groove and the second arc-shaped positioning groove can form one and to be processed The curved surface special-shaped part 16 has an assembly hole 11 whose surface shape matches, and the curved surface special-shaped part 16 to be processed can be stably clamped in the assembly hole 11 to achieve fixation.

In order to ensure that after the lower positioning body 3 and the upper positioning block pressing plate 9 are assembled together, the assembly hole and the curved surface special-shaped part 16 to be processed are kept highly adapted (that is, to avoid deformation of the assembly hole), the upper positioning block pressing plate 9 should be higher than the lower positioning body 3. Precision installation. Therefore, the utility model proposes that the lower positioning body 3 and the upper positioning block pressing plate 9 are positioned through the positioning pin 10 . Specifically, a first positioning hole is provided on the upper side of the lower positioning body 3, a second positioning hole is provided on the upper positioning block pressing plate 9, the second positioning hole is opposite to the first positioning hole, and the positioning pin 10 can be inserted into the first positioning hole. The second positioning hole is fitted with the first positioning hole. The shape of the first positioning hole and the second positioning hole matches the cross-sectional shape of the positioning pin 10 . For example, when the positioning pin 10 adopts a round pin, both the first positioning hole and the second positioning hole are round holes; when the positioning pin 10 adopts a regular polygonal cylinder structure (such as a regular hexagonal cylinder structure), the first positioning hole And the second positioning hole is a regular polygonal hole structure (for example, a regular hexagonal hole structure). After the lower positioning body 3 is installed on the machine tool workbench 1 in this way, the upper positioning block pressing plate 9 is aligned and placed on the lower positioning body 3, and finally the positioning pin 10 is inserted to realize the positioning of the upper positioning block pressing plate 9 on the lower positioning body 3. Positioning installation.

Based on the above structure, it can be seen that the curved surface special-shaped part 16 to be processed is assembled in the assembly hole to realize its fixed installation. In order to improve the processing accuracy of the curved surface special-shaped part 16 to be processed, the utility model should be able to locate the installation of the curved surface special-shaped part 16 to be processed in the assembly hole. Therefore, the utility model is provided with a detection hole vertically on the upper side of the upper positioning block pressing plate 9 and corresponding to the second arc-shaped positioning groove, through which a device capable of positioning and measuring the curved surface special-shaped part 16 to be processed in the assembly hole is installed. Detection percentage table 15.

Specifically, the lower positioning body 3 is a plate structure, and the upper positioning block pressing plate 9 is a plate structure, and the lower positioning body 3 and the upper positioning block pressing plate 9 have a certain thickness (the thickness of the lower positioning body 3 and the upper positioning block pressing plate 9 are consistent) In this way, the contact area with the curved surface special-shaped part 16 to be processed can be increased, which can improve the stability and reliability of the application of the utility model for the curved surface special-shaped part 16 to be processed.

The machining tooling for curved surface special-shaped parts provided by the utility model is a set of devices that can be installed on a machine tool to clamp and fix the curved surface special-shaped parts 16 to be processed. The machine tool includes a machine tool workbench 1 on which a plurality of inverted T-shaped slots 2 are arranged. Based on the structure of the machine tool workbench 1, the utility model adopts the following structure to realize the installation of the lower positioning body 3 on the machine tool workbench 1. Specifically, along the horizontal direction (that is, on the direction parallel to the machine tool workbench 1 table top), the front and rear end faces of the lower positioning body 3 are provided with a relief groove 4 (that is, the left and right end faces of the lower positioning body 3 in Fig. 1 ), Cooperate with the relief groove 4 with a fixed assembly (the fixed assembly is an assembly used to realize the installation of the lower positioning body 3 on the machine tool workbench 1), the fixed assembly includes bolts that slide and fit with the table top of the machine tool workbench 1, and are installed by bolts There is a pressing plate 7, and one end of the pressing plate 7 is stuck in the relief groove 4. The bolt is a cylindrical connector with an external thread, and a circular hole structure (the diameter of the circular hole structure is greater than the diameter of the bolt) is arranged in the middle of the pressing plate 7 in the length direction. The pressure plate 7 is arranged horizontally, the bolt passes through the circular hole structure on the pressure plate 7, one end of the pressure plate 7 can be snapped into the relief groove 4, and the lower side of the other end of the pressure plate 7 is provided with an adjustable support 6, and the adjustable support 6 presses It is installed between the pressure plate 7 and the table top of the machine tool workbench 1, and the adjustable support 6 and the lower positioning body 3 are respectively arranged on both sides of the bolt. The pressing plate 7 is made of hard material, such as metal material, preferably stainless steel material. The lower side of the pressing plate 7 is a plane, and the side of the lower notch of the relief groove 4 (ie, the bottom surface of the relief groove 4 ) is a plane, so that the pressing plate 7 can be stably pressed in the relief groove 4 . In order to keep the pressing plate 7 down steadily, the utility model is also provided with an adjustable support 6. The adjustable support 6 is a height-adjustable supporting member, which is used to be assembled between the pressing plate 7 and the machine tool workbench 1. One end acts as a support.

As can be seen from the above, there are at least two lower positioning bodies 3, and two are taken as an example. The worm 13 is used to adjust the distance between the two lower positioning bodies 3 by adjusting the worm 13 . Specifically, the utility model is provided with a round hole structure on the lower positioning body 3 (the aperture of the round hole structure is greater than the diameter of the adjusting worm 13), and the adjustment for realizing the adjustment of the distance between the lower positioning bodies 3 is provided through the round hole structure. Worm 13. The end of the adjusting worm 13 is provided with a worm gear screw pair 12, and the worm gear screw pair 12 can be offset against the outer surface of the lower positioning body 3.

In a preferred embodiment of the present utility model, the upper side of the lower positioning body 3 is a plane, and the lower positioning body 3 is provided with at least two first arc-shaped positioning grooves; the lower side of the upper positioning block pressing plate 9 is a plane, and the upper The positioning block pressing plate 9 is provided with at least two second arc-shaped positioning grooves, and the second arc-shaped positioning grooves are provided in one-to-one correspondence with the first arc-shaped positioning grooves. According to the above structure optimization, it can be seen that at least two assembly holes are arranged between the lower positioning body 3 and the upper positioning block pressing plate 9, and all the assembly holes can be set according to several commonly used curved surface special-shaped parts 16 to be processed. Such a curved surface special-shaped The mechanical processing tooling for parts can be fixed for several different types of curved surface special-shaped parts 16, so as to improve the applicability, practicability and utilization rate of the present utility model.

As can be seen from the above, the utility model provides a machining tool for curved surface special-shaped parts, the machining tool for curved surface special-shaped parts includes a single-side positioning assembly, and the single-side positioning assembly includes a lower positioning body 3 and an upper positioning block pressing plate 9, The upper side of the lower positioning body 3 is in contact with the lower side of the upper positioning block pressing plate 9. The upper side of the lower positioning body 3 is provided with a first arc positioning groove, and the lower side of the upper positioning block pressing plate 9 is provided with a second arc positioning. Groove, the first arc-shaped positioning groove and the second arc-shaped positioning groove can be formed with an assembly hole matching the surface shape of the curved surface special-shaped part 16 to be processed; the one-side positioning assembly is provided with at least two, and at least two single-side positioning assemblies are spaced apart The assembly holes of at least two unilateral positioning components are set and coaxial. Through the above-mentioned structural design, the curved surface special-shaped part provided by the utility model can be processed with the main body part of the curved surface special-shaped part 16 (if the curved surface special-shaped part 16 to be processed is a rod, then the rod of the curved surface special-shaped part 16 can be processed) provided by the utility model. Body part) for clamping, so that the curved surface special-shaped part 16 to be processed can be stably and reliably assembled on the machine tool for processing. The utility model can complete the process of cutting off the process chuck 17 at both ends of the part 16, the special-shaped groove 18 and the oblique hole 19 of the part 16 under one-time clamping of the curved surface special-shaped part 16 to be processed, effectively improving the processing efficiency and avoiding secondary clamping affect the machining accuracy. The machining tooling for curved surface special-shaped parts provided by the utility model can be machined for curved surface parts 16 of different lengths, and the clamping position can be adjusted according to the position of the detailed structure of the special-shaped parts, which increases the flexibility of processing and expands the size of the tooling. applicability. The utility model has a simple and reasonable structural design, is convenient to use, and can realize stable clamping of the curved surface special-shaped parts 16 to be processed.

The utility model provides a machining tool for curved surface special-shaped parts. The curved surface special-shaped parts mechanical processing tool can solve the problem of the difficulty in clamping and positioning of curved surface special-shaped parts 16 during the processing process, the inability to find alignment during the processing, and the deformation caused by too long suspension Problems and multiple clamping caused problems such as large precision errors and low processing efficiency.

The machining tooling for curved surface special-shaped parts provided by the utility model includes a machine tool workbench 1, and two left and right lower positioning bodies 3 are fixedly arranged on the machine tool workbench 1 (the lower positioning bodies 3 are provided with two, and are arranged in a left-right manner. ), the top of the lower positioning body 3 is equipped with an upper positioning block pressing plate 9, and a fixed connection is realized between the upper positioning block pressing plate 9 and the lower positioning body 3 through a positioning pin 10. On the lower positioning body 3 and the upper positioning block pressing plate 9, arc positioning grooves are arranged (on the side where the lower positioning body 3 contacts with the upper positioning block pressing plate 9, an arc positioning groove structure is arranged, and the arc positioning groove structure is mirror image ), the part 16 is clamped in the arc positioning groove, the upper positioning block pressing plate 9 is designed with a detection positioning hole 14, the detection dial indicator 15 carries out positioning measurement to the part 16 through the detection positioning hole 14, and the lower positioning body 3 is provided with Worm screw 13, the two ends of worm screw 13 are equipped with worm gear screw pair 12. The application of the utility model realizes the precise positioning of the parts 16, and one-time clamping can realize multi-step processing, thereby improving the processing accuracy and processing efficiency.

Specifically, the utility model is provided with a T-shaped groove 2 on the machine tool table 1, and provided with a relief groove 4 (inner groove) on the lower positioning body 3 (the outer surface of the lower positioning body 3). An adjustable support 6 is arranged on the machine tool table 1, a bolt is provided in the T-shaped slot 2, and a pressure plate 7 capable of being pressed on the adjustable support 6 is provided through the bolt, and the pressure plate 7 is kept parallel to the machine tool table 1, One end of the pressing plate 7 can be pressed in the relief groove 4, and the other end of the pressing plate 7 can be pressed on the top surface of the adjustable support 6, and the lower positioning body 3 can be installed on the machine tool table 1 through the cooperation of the pressing plate 7 and the bolts.

In the utility model, the bolt includes a screw rod 5 with external threads, and a threaded slider 8 is installed at the lower end of the screw rod 5, and the threaded slider 8 is arranged in the T-shaped groove 2 (fastened in the T-shaped groove 2).

The top of the lower positioning body 3 is equipped with an upper positioning block pressing plate 9, and the upper positioning block pressing plate 9 and the lower positioning body 3 are fixedly connected by the positioning pin 10, and an arc-shaped positioning groove is all arranged on the lower positioning body 3 and the upper positioning block pressing plate 9. Part 16 is clamped in the arc positioning groove. This kind of tooling can complete the process of cutting off the process chuck 17 at both ends of the part 16, the special-shaped groove 18 and the oblique hole 19 of the part 16 under one clamping of the curved surface special-shaped part 16 to be processed, effectively improving the processing efficiency and avoiding secondary clamping affect the machining accuracy.

The machining tooling for curved surface special-shaped parts provided by the utility model can be machined for curved surface parts 16 of different lengths, and the clamping position can be adjusted according to the position of the detailed structure of the special-shaped parts, which increases the flexibility of processing and expands the size of the tooling. applicability.

It can be known from technical knowledge that the utility model can be realized through other implementations without departing from its spirit or essential features. Accordingly, the above-disclosed embodiments are, in all respects, illustrative and not exclusive. All changes within the scope of the utility model or within the range equivalent to the utility model are included in the utility model.

Claims (10)

1. A machining tool for curved surface special-shaped parts, characterized in that, It includes a single-side positioning assembly, the single-side positioning assembly includes a lower positioning body and an upper positioning block pressing plate, the upper side of the lower positioning body is in contact with the lower side of the upper positioning block pressing plate, and the lower positioning body The upper side is provided with a first arc-shaped positioning groove, and the lower side of the upper positioning block pressing plate is provided with a second arc-shaped positioning groove, and the first arc-shaped positioning groove and the second arc-shaped positioning groove can be formed with Assembly holes matching the surface shape of the curved surface and special-shaped parts to be processed; There are at least two unilateral positioning assemblies, the at least two unilateral positioning assemblies are arranged at intervals, and the assembly holes of the at least two unilateral positioning assemblies are coaxial. 2. The machining tool for curved surface special-shaped parts according to claim 1, characterized in that, The lower positioning body and the upper positioning block pressing plate are positioned through positioning pins. 3. The machining tool for curved surface special-shaped parts according to claim 2, characterized in that, A first positioning hole is provided on the upper side of the lower positioning body, a second positioning hole is provided on the pressing plate of the upper positioning block, the second positioning hole is opposite to the first positioning hole, and the positioning pin It can be inserted into the second positioning hole and fitted with the first positioning hole. 4. The machining tool for curved surface special-shaped parts according to claim 1, characterized in that, A detection hole is vertically arranged on the upper side of the upper positioning block pressing plate and corresponding to the second arc-shaped positioning groove, through which a device capable of positioning and measuring the curved surface special-shaped parts to be processed in the assembly hole is installed. The detection percentage table. 5. The machining tool for curved surface special-shaped parts according to claim 1, characterized in that, The lower positioning body is a plate structure, and the upper positioning block pressing plate is a plate structure. 6. The machining tool for curved surface special-shaped parts according to claim 5, characterized in that, Along the horizontal direction, a relief groove is provided on the front and rear end surfaces of the lower positioning body; A fixing assembly is matched with the relief groove, and the fixing assembly includes bolts that are slidably engaged with the table top of the machine tool, and a pressure plate is installed through the bolts, and one end of the pressure plate is clamped in the relief groove. 7. The machining tool for curved surface special-shaped parts according to claim 6, characterized in that, An adjustable support is provided on the underside of the other end of the press plate, and the adjustable support is pressed between the press plate and the table top of the machine tool table; Moreover, the adjustable support and the lower positioning body are respectively arranged on two sides of the bolt. 8. The machining tool for curved surface special-shaped parts according to claim 7, characterized in that, A circular hole structure is provided on the lower positioning body, and an adjusting worm is provided through the circular hole structure to realize the adjustment of the distance between the lower positioning bodies. 9. The machining tool for curved surface special-shaped parts according to claim 8, characterized in that, A worm gear and screw pair is arranged at the end of the adjusting worm, and the worm gear and screw pair can abut against the outer surface of the lower positioning body. 10. The machining tool for curved surface special-shaped parts according to claim 1, characterized in that, The upper side of the lower positioning body is a plane, and the lower positioning body is provided with at least two first arc-shaped positioning grooves; The lower side of the upper positioning block pressing plate is a plane, and the upper positioning block pressing plate is provided with at least two of the second arc-shaped positioning grooves, and the second arc-shaped positioning grooves are connected with the first arc-shaped positioning grooves. One-to-one correspondence settings.

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