Positioning clamp for machining special-shaped thin-wall part

Abstract

The utility model relates to the technical field of machining, in particular to a positioning clamp for machining a special-shaped thin-walled workpiece, which comprises a support body, a positioning pin component, a pre-positioning component and a pressing component, a plurality of positioning bosses are arranged on the side surface of the support body along the length direction of the support body, and positioning molded surfaces are arranged on the positioning bosses. A positioning groove is correspondingly formed in the support body above each positioning boss; the positioning pin assemblies are arranged on the supporting body on the two sides of each positioning boss; the pre-positioning assembly is detachably connected to the top of the supporting body, a plurality of positioning screws are arranged on the pre-positioning assembly, and the ends of the positioning screws penetrate through the pre-positioning assembly and then enter the corresponding positioning grooves; the pressing assembly is detachably connected to the side, provided with the positioning bosses, of the supporting body, a plurality of pressing parts are arranged on the pressing assembly, and the pressing parts correspond to the positioning bosses in a one-to-one mode. According to the device, accurate positioning and simultaneous clamping of a plurality of special-shaped thin-wall parts are achieved, and subsequent machining is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of machining technology, specifically to a positioning fixture for machining irregularly shaped thin-walled parts. Background Technology

[0002] A positioning fixture is a device used in mechanical manufacturing to fix a workpiece in the correct position for construction or inspection. It is also called a clamp. In a broader sense, any device used to quickly, conveniently and safely install a workpiece in any step of the process can be called a positioning fixture.

[0003] Due to the structural characteristics of the steel clamp parts themselves, existing clamps cannot handle such... Figure 5 The machined surface and the 30° inclined plane of the irregular thin-walled part are accurately positioned, clamped and machined. At the same time, the batch of these irregular thin-walled parts is very large. If the positioning and machining cycle of a single irregular thin-walled part is long, it will have a great impact on the production efficiency of the parts.

[0004] Therefore, there is a need to provide a positioning fixture for machining irregularly shaped thin-walled parts to solve the above problems. Utility Model Content

[0005] This utility model provides a positioning fixture for machining irregularly shaped thin-walled parts to solve existing problems.

[0006] The positioning fixture for machining irregularly shaped thin-walled parts according to this utility model adopts the following technical solution, including:

[0007] The support body has multiple positioning bosses along its length on its side, and the positioning bosses are provided with positioning surfaces, which are used to fit with the positioning surfaces of irregular thin-walled parts; a positioning groove is provided on the support body above each positioning boss.

[0008] The locating pin assembly is located on the support body on both sides of each locating boss;

[0009] A pre-positioning component is detachably connected to the top of the support body and is provided with multiple positioning screws, wherein the ends of the positioning screws pass through the pre-positioning component and enter the corresponding positioning grooves.

[0010] And a clamping assembly, which is detachably connected to one side of the support body where the positioning boss is set, and has multiple clamping parts on it. The clamping parts correspond one-to-one with the positioning boss, and the clamping parts are used to clamp the irregular thin-walled parts on the positioning boss.

[0011] Preferably, the support body is provided with two connecting rods, one end of the connecting rod is connected to the side of the support body where the positioning boss is provided, and the end of the connecting rod away from the support body is provided with a limiting platform, wherein the clamping component is slidably connected to the connecting rod.

[0012] Preferably, the pressing assembly comprises:

[0013] A pressing plate, two U-shaped grooves are arranged on the pressing plate;

[0014] The connecting rod is slidingly connected in the U-shaped groove; a plurality of pressing portions are arranged on the pressing plate between the two U-shaped grooves, and the plurality of pressing portions are uniformly arranged along the pressing plate.

[0015] Preferably, the pressing portion comprises a pressing screw, the pressing screw is threadedly connected on the pressing plate, and the end of the pressing screw is connected with a pressing column.

[0016] Preferably, the two end faces of the support body are provided with clamping tables, and the pre-positioning assembly is clamped with the clamping tables.

[0017] Preferably, the pre-positioning assembly comprises:

[0018] A positioning plate, an installation groove is arranged on the bottom of the positioning plate, a clamping groove is arranged on the groove wall of the installation groove, and the clamping groove is used for clamping with the clamping table of the support body;

[0019] The positioning screw is arranged along the length direction of the positioning plate, and the end of the positioning screw passes through the positioning plate.

[0020] Preferably, the top of the support body is provided with two limiting pins, and the bottom of the positioning plate is provided with two U-shaped limiting grooves in the installation groove, and the U-shaped limiting groove and the limiting pin are matched.

[0021] Preferably, the positioning pin assembly comprises: two positioning pins, one of which is longer than the other, the two positioning pins are arranged along the length direction perpendicular to the support body, and the longer positioning pin is located below the shorter positioning pin.

[0022] The beneficial effects of the utility model are:

[0023] 1. By setting the support body, the pre-positioning assembly and the pressing assembly, a positioning clamp tool is formed, a plurality of special-shaped thin-walled parts can be clamped at the same time, the pre-positioning screw in the pre-positioning assembly is used for pre-pressing and positioning the center position of the machined surface of the special-shaped thin-walled part when the part is clamped, the profile of the positioning groove of the support body is firmly attached, the positioning groove position of the support body is provided with the positioning pin assembly to position the two sides of the special-shaped thin-walled part, and then the pre-positioning assembly is removed to perform cutting processing. The clamp of the utility model is convenient for clamping and positioning the special-shaped thin-walled part, reasonably utilizes the reference surface positioning and pressing, ensures the consistency of the product, reduces the deformation of the product, realizes the stable positioning and clamping of the special-shaped thin-walled part, improves the processing efficiency, and is convenient for production application.

[0024] 2. By arranging the pressing column on the pressing screw, the contact area of the pressing part and the special-shaped thin-walled part is increased, the supporting rigidity of the positioning surface of the special-shaped thin-walled part is increased, and the positioning of the special-shaped thin-walled part is more stable. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a positioning fixture for machining irregularly shaped thin-walled parts according to the present invention;

[0027] Figure 2 This is a schematic diagram of the support structure of a positioning fixture for machining irregularly shaped thin-walled parts according to the present invention;

[0028] Figure 3 This is a schematic diagram of the pre-positioning component of a positioning fixture for machining irregularly shaped thin-walled parts according to the present invention.

[0029] Figure 4 This is a schematic diagram of the clamping assembly of a positioning fixture for processing irregularly shaped thin-walled parts according to the present invention;

[0030] Figure 5 This is a schematic diagram of the irregularly shaped thin-walled component in this embodiment;

[0031] Figure 6 This is a schematic diagram showing the dimensions of the irregularly shaped thin-walled component in this embodiment.

[0032] In the diagram: 1. Support body; 2. Connecting block; 3. Positioning plate; 4. Positioning screw; 5. Connecting rod; 6. Clamping screw; 7. Limiting pin; 8. First positioning pin; 9. Second positioning pin; 10. Clamping platform; 11. Positioning groove; 12. Positioning boss; 13. Limiting groove; 14. Clamping slot; 15. Clamping column; 16. U-shaped groove; 17. Thread; 18. Irregularly shaped thin-walled part. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] This utility model provides an embodiment of a positioning fixture for machining irregularly shaped thin-walled parts. This embodiment is... Figure 5 and Figure 6The fixture shown is used for machining irregularly shaped thin-walled parts, such as Figure 1 As shown, the fixture includes: a support body 1, a positioning pin assembly, a pre-positioning assembly, and a clamping assembly. Multiple positioning bosses 12 are provided on the side of the support body 1 along its length, and each positioning boss 12 has a positioning surface for engaging with the positioning surface of the irregularly shaped thin-walled part 18. A positioning groove 11 is correspondingly provided on the support body 1 above each positioning boss 12. The positioning pin assembly is located on the support body 1 on both sides of each positioning boss. The pre-positioning assembly is detachably connected to the top of the support body 1, and has multiple positioning screws 4. The end of the positioning screw 4 passes through the pre-positioning component and enters the corresponding positioning groove 11; the clamping component is detachably connected to the side of the support body 1 where the positioning boss 12 is provided, and the clamping component is provided with multiple clamping parts, each corresponding to a positioning boss 12, and the clamping parts are used to clamp the irregular thin-walled part 18 on the positioning boss 12. For example, in this embodiment, the support body 1 is provided with 5 positioning grooves 11 and 5 positioning bosses 12. The positioning boss 12 has a 30° positioning surface, and the positioning surface is firmly and securely clamped to the 30° positioning surface of the irregular thin-walled part 18.

[0035] For example, in one specific embodiment, two 30° connecting slopes are provided on both sides of the front end of the support body 1, and two connecting rods 5 are provided on the connecting slopes. One end of the connecting rod 5 is connected to the side of the support body 1 where the positioning boss 12 is provided, and a limiting platform is provided at the end of the connecting rod 5 away from the support body 1. The pressing component is slidably connected to the connecting rod 5.

[0036] For example, in one specific embodiment, such as Figure 4 As shown, the clamping assembly includes: a clamping plate 3, on which two U-shaped grooves 16 are provided; wherein, the connecting rod 5 is slidably connected in the U-shaped grooves 16; multiple clamping parts are provided on the clamping plate 3 between the two U-shaped grooves 16, and the multiple clamping parts are evenly distributed along the clamping plate 3. Each clamping part includes a clamping screw 6, which is threadedly connected to the clamping plate 3, and the end of the clamping screw 6 that passes through the clamping plate 3 is connected to a clamping post 15.

[0037] In order to increase the support rigidity of the positioning surface of the irregular thin-walled part 18, the area of ​​the positioning surface clamping point on the positioning boss 12 is increased to make its positioning stable. In this embodiment, the internal hexagonal cylindrical screw is modified into a clamping screw 6. The clamping end of the clamping screw 6 is threaded with a clamping column 15 to form a clamping assembly. The connecting hole of the clamping column 15 has a 3mm thread and a 5mm open cut inward. The end face of the thread 17 of the clamping screw 6 is SR type. When the clamping column 15 is screwed into the open cut of the thread 17, there is a gap and a certain amount of swing, but it will not come out. The clamping screw 6 makes the end face of the clamping column 15 completely fit and position the 30° inclined surface of the irregular thin-walled part 18. Then the pre-clamping assembly is removed, exposing the machined surface of the irregular thin-walled part 18 in the positioning groove 11.

[0038] For example, in one specific embodiment, the support body 1 has locking platforms 10 on both ends, and the pre-positioning component is engaged with the locking platforms 10, i.e. Figure 3 As shown, the pre-positioning component includes: a positioning plate 2, the bottom of which is provided with an installation groove, and the groove wall of which is provided with a slot 14 for engaging with the slot platform 10 of the support body 1; wherein, in this embodiment, the pre-positioning component is provided with five positioning screws 4, which are arranged along the length direction of the positioning plate 2, and the ends of the positioning screws 4 pass through the positioning plate 2, and the slots 14 at both ends of the positioning plate 2 engage with the slot platforms 10 at both ends of the outer side of the support body 1.

[0039] For example, in one specific embodiment, the top of the support body 1 is provided with two limiting pins 7, and the bottom mounting groove of the positioning plate 2 is correspondingly provided with two U-shaped limiting grooves 13, and the U-shaped limiting grooves 13 and Figure 1 The limiting pin 17 is matched so that the positioning screw 4 is in the center of the pressing surface of the irregular thin-walled part 18, and then the screw is tightened to press the irregular thin-walled part 18 to achieve the pre-positioning effect.

[0040] For example, in one specific embodiment, such as Figure 2 As shown, the positioning pin assembly includes two positioning pins, namely a first positioning pin 8 and a second positioning pin 9. The length of the second positioning pin 9 is greater than the length of the first positioning pin 8. The first positioning pin 8 and the second positioning pin 9 are arranged sequentially along the length direction of the vertical support body 1, and the second positioning pin 9 is located below the first positioning pin 8.

[0041] Working principle

[0042] When using, Figure 5The positioning surface of the special-shaped thin-walled part 18 is positioned on the positioning profile of the positioning boss 12 on the support body, then the pre-positioning assembly positions the special-shaped thin-walled part 18, the pre-positioning process is that the positioning screws 4 are loosened, the clamping groove 14 of the positioning plate 2 of the pre-positioning assembly is clamped on the clamping table 10 on the support body 1, and the positioning screws 4 on the positioning plate 2 are aligned with each positioning groove 11 on the support body 1, at this time, the positioning screws 4 are tightened to make the positioning screws 4 and the machined surface of the special-shaped thin-walled part 18 contact tightly, at this time, the special-shaped thin-walled part 18 is pressed by the pressing assembly, the pressing process is that the pressing column 15 and the threaded end of the pressing screw 6 are connected, and the pressing screw 6 is tightened to make each pressing screw 6 contact the positioning surface of the special-shaped thin-walled part 18 on the positioning profile of the corresponding positioning boss 12, until the special-shaped thin-walled part 18 is tightly pressed, the pressing of the special-shaped thin-walled part 18 is completed, then the pre-positioning assembly is removed, after the pre-positioning assembly is removed, the machined surface of the special-shaped thin-walled part 18 in the positioning groove 11 of the support body 1 is exposed, at this time, the special-shaped thin-walled part 18 is machined.

[0043] In summary, the positioning clamp for special-shaped thin-walled part machining provided by the embodiment of the utility model adopts multi-station clamping, clamping and positioning are convenient, the reference surface is reasonably utilized for positioning and pressing, the consistency of products is ensured, the deformation of products is reduced, the machining efficiency is improved, practical production application is facilitated, and the purpose of reducing cost and increasing benefit is achieved.

[0044] The above only describes preferred embodiments of the utility model, and is not used to limit the utility model, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A positioning fixture for machining irregularly shaped thin-walled parts, characterized in that, The utility model relates to a supporting body, a plurality of positioning bosses are arranged on the side of the supporting body along the length direction of the supporting body, and a positioning profile is arranged on the positioning boss, the positioning profile is used for being attached with the positioning surface of the special-shaped thin-wall part, a positioning groove is correspondingly arranged above each positioning boss on the supporting body, A positioning pin assembly is arranged on the supporting body on both sides of each positioning boss, A pre-positioning assembly is detachably connected to the top of the supporting body, a plurality of positioning screws are arranged on the pre-positioning assembly, and the end of the positioning screw enters the corresponding positioning groove after passing through the pre-positioning assembly, And a pressing assembly is detachably connected to the side of the supporting body where the positioning boss is arranged, a plurality of pressing parts are arranged on the pressing assembly, the pressing part and the positioning boss are one-to-one corresponding, and the pressing part is used for pressing the special-shaped thin-wall part on the positioning boss. Two connecting rods are arranged on the supporting body, one end of the connecting rod is connected to the side of the supporting body where the positioning boss is arranged, and the end of the connecting rod away from the supporting body is provided with a limiting table.

2. The positioning fixture for processing of a profiled thin-walled part according to claim 1, characterized in that The pressing assembly comprises:

3. The positioning fixture for processing of a profiled thin-walled part according to claim 2, characterized in that A pressing plate is provided with two U-shaped grooves, Wherein, the connecting rod is slidingly connected in the U-shaped groove; a plurality of pressing parts are arranged on the pressing plate between the two U-shaped grooves, and the plurality of pressing parts are uniformly arranged along the pressing plate. The pressing part comprises a pressing screw, the pressing screw is threadedly connected to the pressing plate, and the end of the pressing screw passes through the pressing plate and is connected with a pressing column.

4. The positioning fixture for processing of a profiled thin-walled part according to claim 3, characterized in that The two end faces of the supporting body are provided with clamping tables, and the pre-positioning assembly is clamped with the clamping table.

5. The positioning fixture for processing of a profiled thin-walled part according to claim 1, characterized in that The pre-positioning assembly comprises:

6. The positioning fixture for processing of a profiled thin-walled part according to claim 5, characterized in that A positioning plate is provided with a mounting groove at the bottom, a clamping groove is arranged on the groove wall of the mounting groove, and the clamping groove is used for clamping with the clamping table of the supporting body; Wherein, the positioning screw is arranged along the length direction of the positioning plate, and the end of the positioning screw passes through the positioning plate. The top of the supporting body is provided with two limiting pins, and the bottom mounting groove of the positioning plate is correspondingly provided with two U-shaped limiting grooves, and the U-shaped limiting groove and the limiting pin are matched.

7. The positioning fixture for processing of a profiled thin-walled part according to claim 6, characterized in that The positioning pin assembly comprises: two positioning pins, one of which has a length greater than the other, the two positioning pins are arranged along the length direction perpendicular to the supporting body, and the longer positioning pin is located below the shorter positioning pin.

8. The positioning fixture for processing of a profiled thin-walled part according to claim 1, characterized in that ​

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