Multi-shaft machining tool for special-shaped thin-wall frame part

Abstract

A multi-shaft machining tool for special-shaped thin-wall frame parts comprises a base and a positioning clamp connected to the base, the positioning clamp comprises a positioning supporting seat, a pressing plate and a supporting screw rod, a base plate of the positioning supporting seat is connected with the base, a positioning boss of the positioning supporting seat comprises a main body part, and a middle positioning block is arranged in the middle of the main body part in a protruding mode; a front end positioning block is arranged at the front end of the main body in a protruding mode, a pushing block containing groove is formed in the middle of the front end positioning block, a spring is arranged at the bottom end of the pushing block containing groove, a pushing block is pressed on the spring, and the top face of the pushing block can abut against the bottom face of the part connecting plate. The supporting screw is mounted in the screw mounting hole and extends upwards to form a supporting column capable of supporting a connecting rod at the rear end of the part, the pressing plate is pressed above the part to be machined on the middle positioning block, and the fixing bolt penetrates through the pressing plate to tightly press the part to be machined. By means of the clamp, parts can be stably and rapidly clamped, main machining is completed through one-time clamping, and the machining efficiency and the product percent of pass are improved.

Description

Technical Field

[0001] The utility model relates to a machining tooling, in particular to a machining tooling for special-shaped thin-wall frame parts. Background Art

[0002] As Figure 1 、 Figure 2 shown is a structural diagram of a special-shaped thin-wall frame part. This special-shaped thin-wall frame is first obtained by casting a blank workpiece, and then the blank workpiece is machined. The special-shaped thin-wall frame workpiece includes opposite side walls A1 and B2, and a connecting plate 5 connected between the front ends of the two side walls. Through holes with corresponding positions are provided on the side walls A1 and B2. Three through holes are provided on the upper surface of the front end of the connecting plate 5. An inclined butt plate 3 extends upward and backward from the upper side of the front end of the connecting plate 5. The inner side of the inclined butt plate 3 is an inner arc surface 6, and a plurality of through holes are provided on the side wall of the inner arc surface 6. Among them, the parts that need to be machined are: the inner and outer surfaces of the side walls A1 and B2, the through holes on the side walls A1 and B2, the front surface and through holes of the connecting plate 5, the front surfaces 4 of the side walls A1, B2, connecting plate 5 and inclined butt plate 3 and the positioning holes on the front surfaces 4, the inner arc surface 6 and through holes of the inclined butt plate 3. The traditional processing method is to clamp the special-shaped thin-wall frame workpiece in multiple steps. First, machine the outer surface of the side wall A1, then use the outer surface of the side wall A1 as the positioning surface to machine the outer surface of the side wall B2. After that, clamp the side walls A1 and B2, and then machine the front surface and through holes of the connecting plate 5. After that, clamp the side walls A1, B2 and the connecting plate 5, and then machine the front surfaces 4 of the side walls A1, B2, connecting plate 5 and inclined butt plate 3 and the positioning holes on the front surfaces 4. After that, machine the inner surfaces of the side walls A1 and B2, and finally machine the inner arc surface 6 and through holes of the inclined butt plate 3.

[0003] Since this special-shaped thin-wall frame part is small in volume, light in weight, and the side walls A1, B2 and the connecting plate 5 are all relatively thin, when machining using the above-mentioned existing technology, the special-shaped thin-wall frame part is extremely easy to deform during the machining process, and the cumulative machining error of the part after multiple clampings is relatively large, the product qualification rate is low, and the machining efficiency is also relatively low. Summary of the Invention

[0004] The purpose of the utility model is to provide a multi-axis machining tooling for special-shaped thin-wall frame parts aiming at the defects existing in the above-mentioned existing technology, which can stably and quickly clamp the parts, complete the main machining in one clamping, and effectively improve the machining efficiency and product qualification rate.

[0005] The technical solution adopted by the present utility model to achieve the above object is as follows: A multi-axis machining tooling for a special-shaped thin-walled frame part, comprising a base and a positioning fixture connected to the base. The positioning fixture includes a positioning support base, a pressing plate, and a support screw. The positioning support base includes a chassis and a positioning boss connected to the middle of the upper surface of the chassis. The chassis is connected to the base through a fixing device. The positioning boss includes a main body part. A middle positioning block protrudes from the middle of the main body part. A fixing threaded hole is provided in the middle of the middle positioning block. A front-end positioning block protrudes from the front end of the main body part. A push block receiving groove is recessed downward in the middle of the front-end positioning block. A spring is provided at the bottom end of the push block receiving groove. A push block is provided on the spring and presses on the spring. The top surface of the push block protrudes from the push block receiving groove and can abut against the bottom surface of the part connecting plate. A screw mounting hole is provided at the rear end of the main body part. The support screw is mounted in the screw mounting hole and extends upward to form a support column capable of supporting the rear connecting rod of the part. The pressing plate presses on the part to be machined above the middle positioning block. The locking bolt II passes through the middle through hole of the pressing plate and is connected to the fixing threaded hole in the middle of the middle positioning block to lock the part to be machined on the lower side of the pressing plate.

[0006] A further technical solution of the present utility model is: A locking threaded hole extending vertically backward from the front side surface and penetrating the push block receiving groove is further provided at the front end of the front-end positioning block. The locking bolt I is provided in the locking threaded hole and can press backward on the vertical surface of the push block.

[0007] A further technical solution of the present utility model is: A flat positioning clamping surface is recessed backward on the front side of the middle section of the push block. An avoidance groove is recessed downward in the middle of the upper surface of the push block.

[0008] A further technical solution of the present utility model is: A spring positioning hole with a smaller hole diameter than the push block receiving groove is provided on the lower side of the push block receiving groove. The bottom end of the spring is arranged in the spring positioning hole.

[0009] A further technical solution of the present utility model is: The screw mounting hole penetrates the upper and lower surfaces at the rear end of the main body part. The screw mounting hole is a stepped hole with a larger diameter at the bottom end and a smaller diameter at the top end. The support screw is mounted in the screw mounting hole from bottom to top, and the upper end of the support screw protrudes from the screw mounting hole and extends upward to form a support column capable of supporting the rear connecting rod of the part.

[0010] A further technical solution of the present utility model is: A rear connecting rod capable of preventing the deformation of the two side walls is connected between the rear ends of the two side walls of the part to be machined.

[0011] A further technical solution of the present utility model is: Lateral positioning platforms are respectively recessed downward on the left and right sides of the main body part of the positioning support base.

[0012] The multi-axis machining tooling for an irregular thin-walled frame part of the present utility model has the following beneficial effects: When the part to be machined is positioned on the multi-axis machining tooling of the present utility model, the front connecting plate of the part to be machined is positioned on the front positioning block, and the bottom end is elastically supported by the pushing block. The inner rear end of the part to be machined is positioned by the middle positioning block and can be clamped by the pressing plate. The inner front surface of the front ends of the two side walls of the part to be machined is positioned by the side wall of the lateral positioning table. There is a rear connecting rod between the rear ends of the two side walls of the part to be machined. At the rear end of the main body of the positioning boss, there is a support screw extending upward. The support screw can support the rear connecting rod between the two side walls, effectively preventing machining errors caused by the inward contraction of the two side walls. One-time positioning and clamping can machine: the inner surfaces of the two side walls, the through holes on the side walls, the front surface and through holes of the connecting plate, the front surfaces of the connecting plate and the inclined butt plate and the positioning holes on the front surfaces, the inner arc surface and through holes of the inclined butt plate; multiple machining processes can be completed in one clamping, effectively improving the machining efficiency and reducing the machining cost, and also reducing the cumulative machining error. The overall structure of the components of the positioning fixture is simple, easy to machine, and the cost is not high. Finally, the rear connecting rod is cut off to obtain the part to be machined, improving the qualification rate of part machining.

[0013] The following further describes the multi-axis machining tooling for an irregular thin-walled frame part of the present utility model with reference to the accompanying drawings and embodiments. Description of the Drawings

[0014] Figure 1 is a three-dimensional view of the irregular thin-walled frame part;

[0015] Figure 2 is Figure 1 another direction view of the irregular thin-walled frame part shown;

[0016] Figure 3 is Figure 1 a structural schematic diagram of the irregular thin-walled frame part shown without the rear connecting rod cut off;

[0017] Figure 4 is a structural schematic diagram of the multi-axis machining tooling for an irregular thin-walled frame part of the present utility model before installing the pressing plate;

[0018] Figure 5 is Figure 4 the top view of;

[0019] Figure 6 is Figure 5 a cross-sectional view of the multi-axis machining tooling shown along the A-A direction;

[0020] Figure 7 is to install the part to be machined on Figure 4 the structural schematic diagram of the multi-axis machining tooling shown;

[0021] Figure 8 is when inFigure 7 Schematic diagram of the structure after adding a pressing plate and locking it with fixing bolts on the basis of

[0022] Figure 9 is Figure 8 Another view in a different direction of

[0023] Explanation of the reference numerals in the attached drawings: 1 - Side wall A, 2 - Side wall B, 3 - Inclined butt plate, 4 - Front end face, 5 - Connecting plate, 6 - Inner arc surface, 7 - Rear end connecting rod, 8 - Support plate, 9 - Positioning support seat, 10 - Base, 11 - Columnar support body, 12 - Chassis, 13 - Locking bolt I, 14 - Front end positioning block, 15 - Thrust block, 16 - Avoidance groove, 17 - Middle positioning block, 18 - Fixed threaded hole, 19 - Support screw, 20 - Positioning boss, 21 - Lateral positioning table, 22 - Fixed bolt, 23 - Connecting boss, 24 - Locking threaded hole, 25 - Positioning clamping surface, 26 - Screw mounting hole, 27 - Positioning pin, 28 - Spring, 29 - Spring positioning hole, 30 - Thrust block receiving groove, 31 - Pressing plate, 32 - Locking bolt II, 33 - Main body part. Detailed implementation manners

[0024] As Figures 4 to 9 shown, a multi-axis machining tooling for a special-shaped thin-walled frame part of the present utility model includes a base 10 and a positioning fixture connected to the base 10. The base 10 includes a connecting boss 23 and a columnar support body 11. The positioning fixture is fixedly connected to the top end of the columnar support body 11. The connecting boss 23 connects the base 10 to the workbench (not shown in the figure) of a multi-axis numerical control machine tool through a connecting device. To increase the rigidity of the part to be machined, a rear end connecting rod 7 that can prevent the deformation of two side walls is connected between the rear ends of the two side walls of the part to be machined. After the part machining is completed, the rear end connecting rod 7 is cut off to obtain the product to be machined.

[0025] As Figures 4 to 6As shown in the figure, the positioning fixture includes a positioning support base 9, a pressing plate 31, and a support screw 19. The positioning support base 9 includes a chassis 12 and a positioning boss 20 connected to the middle of the upper surface of the chassis 12. The chassis 12 is connected to the base 10 through a fixing device. The chassis 12 is provided with positioning holes and connection holes. The upper end of the columnar support 11 of the base 10 is also provided with positioning holes and connection holes. The bottom surface of the chassis 12 is butt-jointed with the top surface of the columnar support 11 of the base 10. The positioning holes are mutually positioned through positioning pins 27. The fixing bolts 22 fixedly connect the chassis 12 to the columnar support 11 of the base 10 through the corresponding connection holes. The positioning boss 20 of the positioning support base 9 includes a main body part 33. A middle positioning block 17 protrudes in the middle of the main body part 33. A fixing threaded hole 18 is provided in the middle of the middle positioning block 17. The middle positioning block 17 is used to support the support plate 8 between the inner sides of the rear ends of the two side plates. A front positioning block 14 protrudes at the front end of the main body part 33. The front positioning block 14 is used to support the connecting plate between the front ends of the two side walls. A push block receiving groove 30 is recessed downward in the middle of the front positioning block 14. A spring 28 is provided at the bottom end of the push block receiving groove 30. A push block 15 is provided on the spring 28 and presses on the spring 28. The top surface of the push block 15 protrudes from the push block receiving groove 30 and can elastically abut against the bottom surface of the part connecting plate. In this embodiment, a locking threaded hole 24 extending vertically backward from the front side surface and penetrating the push block receiving groove 30 is further provided at the front end of the front positioning block 14. The locking bolt I 13 is arranged in the locking threaded hole 24 and can press backward on the vertical surface of the push block 15. A flat positioning clamping surface 25 is recessed backward on the front side of the middle section of the push block 15. When the locking bolt I 13 is arranged in the locking threaded hole 24 and presses the push block 15 backward, it presses on the positioning clamping surface 25. A spring positioning hole 29 with a smaller aperture than that of the push block receiving groove 30 is provided on the lower side of the push block receiving groove 30. The bottom end of the spring 28 is arranged in the spring positioning hole 29. The spring 28 is pressed by the push block 15 in the spring positioning hole 29. The push block 15 can elastically abut against the bottom surface of the connecting plate under the upward elastic force of the spring 28. A relief groove 16 is recessed downward in the middle of the upper surface of the push block 15 to facilitate the machining of the through hole in the middle of the connecting plate. Lateral positioning platforms 21 are respectively recessed downward on the left and right sides of the main body part 33 of the positioning support base 9. The front ends of the two side walls of the part are respectively attached to the side walls of the lateral positioning platforms 21.

[0026] As Figures 4 to 6 As shown in the figure, a screw mounting hole 26 is provided at the rear end of the main body part 33 of the positioning support base 9. The support screw is installed in the screw mounting hole 26 and extends upward to form a support column capable of supporting the rear connecting rod 7 of the part. In this embodiment, the screw mounting hole 26 penetrates the upper and lower surfaces at the rear end of the main body part 33. The screw mounting hole 26 is a stepped hole with a larger diameter at the bottom end and a smaller diameter at the top end. The section with a smaller diameter is a threaded hole. The support screw 19 is installed in the screw mounting hole 26 from bottom to top, and the upper end of the support screw 19 protrudes from the screw mounting hole 26 and extends upward to form a support column capable of supporting the rear connecting rod 7 of the part.

[0027] Before the part to be machined is positioned on the positioning support base 9, first place the spring 28 in the spring positioning hole 29, and place the pushing block into the pushing block receiving groove 30 and press it on the spring 28. Then position the part to be machined on the positioning support base 9, so that the front ends of the two side walls of the part to be machined are attached to the side walls of the lateral positioning table 21. The connecting plate between the front ends of the two side walls is supported by the front positioning block 14, and the support plate 8 between the inner sides of the rear ends of the two side plates is supported by the middle positioning block 17, as Figure 7 shown. Then press the pressure plate 31 above the part to be machined on the middle positioning block 17, and the locking bolt II 32 passes through the middle through hole of the pressure plate 31 and is connected to the fixed threaded hole 18 in the middle of the middle positioning block 17 to lock the part to be machined on the lower side of the pressure plate 31, as Figure 8 , 9 shown. This is a multi-axis numerical control machine tool that can respectively machine the inner and outer surfaces of side wall A and side wall B, the through holes on side wall A and side wall B, the front surface and through holes of the connecting plate, the front surfaces and positioning holes on the front surfaces of side wall A, side wall B, the connecting plate and the inclined butt joint plate, and the inner arc surface and through holes of the inclined butt joint plate. Multiple machining processes can be completed in one clamping, which not only improves the machining efficiency, reduces the cumulative machining error, but also effectively reduces the machining cost.

[0028] The above embodiments are only the preferred embodiments of the present invention. The structure of the present invention is not limited to the forms listed in the above embodiments. Any modifications, equivalent replacements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A multi-axis machining tooling for special-shaped thin-wall frame parts, including a base (10) and a positioning fixture connected to the base (10), characterized in that, The positioning fixture includes a positioning support base (9), a pressing plate (31), and a support screw (19). The positioning support base (9) includes a chassis (12) and a positioning boss (20) connected to the middle of the upper surface of the chassis (12). The chassis (12) is connected to the base (10) through a fixing device. The positioning boss (20) includes a main body portion (33). A middle positioning block (17) protrudes from the middle of the main body portion (33). A fixing threaded hole (18) is provided in the middle of the middle positioning block (17). A front positioning block (14) protrudes from the front end of the main body portion (33). A push block receiving groove (30) is recessed downward in the middle of the front positioning block (14). A spring (28) is provided at the bottom end of the push block receiving groove (30). A push block (15) pressing on the spring (28) is provided on the spring (28). The top surface of the push block (15) protrudes from the push block receiving groove (30) and can abut against the bottom surface of the part connecting plate (5). A screw mounting hole (26) is provided at the rear end of the main body portion (33) of the positioning support base (9). The support screw (19) is installed in the screw mounting hole (26) and extends upward to form a support column capable of supporting the rear link (7) of the part. The pressing plate (31) presses on the part to be machined above the middle positioning block (17). The locking bolt II (32) passes through the middle through hole of the pressing plate (31) and is connected to the fixing threaded hole (18) in the middle of the middle positioning block (17) to lock the part to be machined on the lower side of the pressing plate (31).

2. The multi-axis machining tooling for a special-shaped thin-walled frame part as described in claim 1, wherein A locking threaded hole (24) extending vertically backward from the front side surface and penetrating the push block receiving groove (30) is further provided at the front end of the front positioning block (14). The locking bolt I (13) is provided in the locking threaded hole (24) and can press backward on the vertical surface of the push block (15).

3. The multi-axis machining tooling for a special-shaped thin-walled frame part as described in claim 2, wherein A flat positioning clamping surface (25) is recessed backward on the front side of the middle section of the push block (15). An avoidance groove (16) is recessed downward in the middle of the upper surface of the push block (15).

4. The multi-axis machining tooling for a special-shaped thin-walled frame part as described in claim 1, characterized in that, A spring positioning hole (29) with a smaller diameter than the diameter of the push block receiving groove (30) is provided on the lower side of the push block receiving groove (30). The bottom end of the spring (28) is arranged in the spring positioning hole (29).

5. The multi-axis machining tooling for a special-shaped thin-walled frame part as described in claim 1, characterized in that, The screw mounting hole (26) penetrates the upper and lower surfaces at the rear end of the main body portion (33). The screw mounting hole (26) is a stepped hole with a larger diameter at the bottom end and a smaller diameter at the top end. The support screw (19) is installed in the screw mounting hole (26) from bottom to top, and the upper end of the support screw (19) protrudes from the screw mounting hole and extends upward to form a support column capable of supporting the rear link (7) of the part.

6. The multi-axis machining tooling for a special-shaped thin-walled frame part as described in claim 1, characterized in that, A rear link (7) capable of preventing the deformation of the two side walls is connected between the rear ends of the two side walls of the part to be machined.

7. The multi-axis machining tooling for a special-shaped thin-walled frame part according to claim 1, characterized in that, Lateral positioning platforms (21) are respectively recessed downward on the left and right sides of the main body portion (33) of the positioning support base (9).

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