Vertical milling clamp for part of die-casting aluminum part

Abstract

The utility model discloses a die-casting aluminum part vertical milling processing clamp, which relates to the technical field of vertical milling processing clamps and comprises a clamp bottom plate, a clamp top plate, a plurality of supporting upright posts, three side surface limiting blocks and three side surface extruding clamps, the three circular ring supporting faces are arranged below the three circular ring through holes of the workpiece, so that the workpiece can be stably supported, downward force during cutting is effectively borne, it is guaranteed that the workpiece is always kept in a stable posture in the machining process, and the planeness of the bottom face is guaranteed to a great extent; the three side surface limiting blocks and the three side surface extruding clamps are cooperatively used, so that the positioning error is eliminated to the greatest extent; and through the efficient clamping and machining process, the machining time of a single workpiece is shortened, the utilization rate of equipment is increased, the labor cost and the energy consumption cost are reduced, and remarkable economic benefits are brought to enterprises.

Description

Technical Field

[0001] This utility model relates to the field of vertical milling fixture technology, specifically a vertical milling fixture for die-cast aluminum parts. Background Technology

[0002] In the current field of die-cast aluminum parts processing, as the manufacturing industry's requirements for product precision and production efficiency continue to rise, traditional machining fixture technology is gradually revealing many limitations. This is especially true for milling processes of die-cast aluminum parts, particularly... Figure 9 When machining the entire bottom surface and a specific number of small and large holes of the workpiece shown, ensuring machining accuracy presents a significant challenge.

[0003] For example, traditional fixtures struggle to achieve stable and precise positioning when ensuring the perpendicularity of the large hole to the bottom surface and the flatness of the bottom surface. This is due to their unreasonable positioning methods and clamping structures. Most traditional fixtures use upper and lower clamping devices, which are not only cumbersome and time-consuming to operate during clamping, but also prevent the entire bottom surface from being machined in one go due to the distribution of clamping points, thus affecting the flatness of the bottom surface and the perpendicularity of the large hole to the bottom surface. Furthermore, the interference of cutting forces is a significant problem in actual machining. Traditional fixtures cannot effectively resist cutting forces, making the workpiece prone to displacement during machining, severely impacting the stability of machining quality. Especially for die-cast aluminum parts with specific draft angles, traditional fixtures fail to fully utilize this characteristic for reasonable positioning and clamping design, further limiting the improvement of machining accuracy and efficiency.

[0004] In terms of production efficiency, the complex clamping process of traditional fixtures increases the processing cycle of a single workpiece, making it difficult to meet the needs of large-scale production. At the same time, frequent clamping adjustments and unstable machining accuracy lead to an increased scrap rate, further increasing production costs.

[0005] In summary, existing die-cast aluminum part machining fixtures have significant shortcomings in terms of machining accuracy, clamping convenience, stability, and production efficiency when dealing with workpieces with high precision requirements as described in this invention. Summary of the Invention

[0006] The purpose of this utility model is to provide a vertical milling fixture for die-cast aluminum parts, so as to solve the problems mentioned in the background art that the existing die-cast aluminum parts machining fixtures have obvious deficiencies in terms of machining accuracy, clamping convenience, stability and production efficiency when dealing with the machining of workpieces with high precision requirements as involved in this invention.

[0007] To achieve the above object, the utility model provides the following technical scheme: a kind of die-casting aluminum part partial end milling processing fixture, including the fixture bottom plate of lower part and the fixture top plate of upper part and multiple support columns being arranged between two plates;The top surface of the fixture top plate is provided with workpiece through hole, two annular support surfaces are arranged on the top surface of the fixture top plate on the left side of the workpiece through hole, one annular support surface is arranged on the right side, workpiece is stably supported by three annular support surfaces, one side surface limiting block is arranged on the top surface of the fixture top plate on the left side of the workpiece through hole, two side surface limiting blocks are arranged on front side, one side surface extrusion clamp is arranged on right side, two side surface extrusion clamps are arranged on rear side.

[0008] Preferably, the fixture bottom plate is rectangularly arranged and a plurality of vertical support columns are arranged in a rectangular array on the top surface thereof near the edge, the top ends of the plurality of support columns are collectively provided with a rectangularly arranged fixture top plate, and the fixture top plate and the support columns are fixed by bolts.

[0009] Preferably, the fixture top plate is provided with an annular through hole coaxial with the annular support surface, and the annular support surface is mounted and fixed by bolts on both sides of the annular through hole.

[0010] Preferably, the side surface limiting block includes a limiting block body fixed on the top surface of the fixture top plate by bolts, and a workpiece pressing protrusion is protrudingly arranged on the side of the limiting block body close to the fixture top plate.

[0011] Preferably, the side surface extrusion clamp includes a hollow rectangular guide block fixed on the top surface of the fixture top plate by bolts, an inclined surface extrusion sliding block is built in the rectangular guide block, the inclined surface extrusion sliding block is connected to a clamp pressing block arranged outside the rectangular guide block through a connecting rod on the side close to the workpiece through hole, a V-shaped extrusion surface is arranged on the vertical side of the clamp pressing block close to the workpiece through hole, an extrusion cylinder is arranged below each rectangular guide block on the bottom surface of the fixture top plate, an extrusion wedge is arranged at the top end of the piston shaft of the extrusion cylinder, and the extrusion wedge is in contact with the inclined surface of the inclined surface extrusion sliding block.

[0012] Preferably, the workpiece pressing protrusion is provided with an inclined surface of 1.5 degrees matching the side surface angle thereof, and the V-shaped extrusion surface is provided with an inclined surface of 1.5 degrees matching the outside surface of the workpiece top plate.

[0013] Preferably, a return spring is arranged between the rear end of the inclined surface extrusion sliding block and the rear side wall of the rectangular guide block.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. The utility model discloses a three circular ring supporting surfaces are arranged below the three circular ring through holes of the workpiece, can stably support the workpiece according to the principle that three points determine a plane, effectively bears the downward force when cutting, ensures that the workpiece always keeps stable posture in the processing, greatly guarantees the flatness of bottom surface,

[0016] 2. Through the cooperative use of three side face limiting blocks and three side face extrusion clamps, positioning errors are eliminated to the maximum extent, and the contact planes of the three side face limiting blocks and the three side face extrusion clamps have a downward angle of 1.5 degrees, which is matched with the demolding slope of the side face of the workpiece, and the three side face extrusion clamps vertically act on the surface of the workpiece during extrusion, and a continuous downward force is generated, which not only effectively overcomes the vibration caused by the cutting force in the continuous cutting process and avoids the workpiece from leaving the positioning surface, but also provides firm support for ensuring the perpendicularity of the large hole and the bottom surface.

[0017] 3. The workpiece is fixed on the clamp positioning stop block by skillfully utilizing the cooperation between the demolding angle of the casting and the side extrusion structure, the traditional up-down pressing device is abandoned, one-time machining of the entire bottom surface becomes a reality, the machining cycle is greatly shortened, and the machining efficiency is significantly improved.

[0018] 4. The side extrusion head of the side extrusion structure is rotatably connected to the side extrusion sliding block through a pin, can flexibly adapt to the slight differences of each workpiece, ensures that the force borne by the extrusion head during extrusion is consistent with the designed predetermined force, and further enhances the adaptability and stability of the clamp to different workpieces.

[0019] 5. The efficient clamping and machining process shortens the machining time of a single workpiece, improves the utilization rate of the equipment, reduces the labor cost and energy consumption cost, and brings significant economic benefits to enterprises. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the workpiece putting schematic view of the utility model;

[0021] Figure 2 It is the axonometric view of the utility model;

[0022] Figure 3 It is Figure 2 Top view;

[0023] Figure 4 It is Figure 2 Sectional view of middle A-A, B-B and C-C;

[0024] Figure 5 It is Figure 2 Sectional view of middle D-D and E-E;

[0025] Figure 6 It is Figure 3 Partial schematic view;

[0026] Figure 7 is Figure 6 sectional view of A-A in figure

[0027] Figure 8 is Figure 6 sectional view of B-B in figure

[0028] Figure 9 is a schematic view of the workpiece

[0029] In the figure: workpiece base-A1, workpiece top plate-A2, large round hole-A3, small round hole-A4, clamp base plate-1, clamp top plate-2, workpiece through hole-21, circular ring support surface-22, circular ring through hole-23, support column-3, side limiting block-4, limiting block main body-41, workpiece clamping convex block-42, side extrusion clamp-5, rectangular guide block-51, inclined surface extrusion sliding block-52, clamp clamping block-53, V-shaped extrusion surface-54, extrusion cylinder-55, extrusion wedge-56, reset spring-57. DETAILED DESCRIPTION

[0030] In order to make the technical personnel in the art better understand the technical solutions of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings and specific embodiments.

[0031] Please refer to Figures 1-9 , Figure 1 is a schematic view of the workpiece put in the present application Figure 2 is an axonometric view of the present application Figure 3 is Figure 2 top view Figure 4 is Figure 2 sectional view of C-C in figure Figure 5 is Figure 2 sectional view of A-A in figure Figure 6 is Figure 3 part schematic view Figure 7 is Figure 6 sectional view of A-A in figure Figure 8 is Figure 6 sectional view of B-B in figure Figure 9 is a schematic view of the workpiece

[0032] As Figure 9The workpiece shown includes a U-shaped workpiece base A1, a workpiece top plate A2 is arranged at the top of the two side edges of the workpiece base A1, the outer side of the workpiece top plate A2 is provided with a 1.5-degree inclined surface, the top surface of the workpiece top plate A2 is a plane and is provided with a large circular hole A3 with a diameter of φ62 at the center, and the axis of the large circular hole A3 is perpendicular to the top surface of the workpiece top plate A2; meanwhile, two small circular holes A4 with a diameter of φ17 are arranged in front of and behind the left side near the left side of the large circular hole A3, and one small circular hole A4 with a diameter of φ17 is arranged at the right side near the right side of the large circular hole A3; after the workpiece is completed casting, the top surface of the workpiece top plate A2 needs to be machined into a plane, and one large circular hole A3 and three small circular holes A4 are machined.

[0033] The utility model provides a kind of die-casting aluminum part partial end milling processing fixture, for the clamping fixation of above-mentioned workpiece and the top surface machining of its workpiece top plate A2 into plane and the machining of one large circular hole A3 and three small circular holes A4;Including the fixture bottom plate 1 of lower part and the fixture top plate 2 of upper part which are mutually parallel, and multiple vertical support columns 3 are arranged between the fixture bottom plate 1 and fixture top plate 2, workpiece through hole 21 for the workpiece base A1 is arranged on the top surface of the fixture top plate 2, and circular ring support surface 22 corresponding to the position of small circular hole A4 is arranged on the top surface of the fixture top plate 2 on the left and right sides of workpiece through hole 21, and workpiece is stably supported by three circular ring support surfaces 22, and downward force when cutting is borne;In addition, side limiting block 4 located left side one and front side two and side extrusion clamp 5 located rear side two and right side one are arranged on the top surface of the fixture top plate 2 around workpiece through hole 21, workpiece is clamped and fixed by the collaborative use of three side limiting blocks 4 and three side extrusion clamps 5, so as to facilitate workpiece machining.

[0034] The fixture bottom plate 1 is rectangularly arranged, and multiple vertical support columns 3 are arranged in rectangular arrangement on the top surface of the fixture bottom plate 1 near the edge, the top ends of the multiple support columns 3 are commonly provided with a rectangularly arranged fixture top plate 2, and the fixture top plate 2 and the support columns 3 are fixed by bolts.

[0035] The fixture top plate 2 is provided with a circular ring through hole 23 coaxial with the circular ring support surface 22, and the circular ring support surface 22 is installed and fixed by bolts on the two sides of the circular ring through hole 23.

[0036] The side limiting block 4 includes a limiting block body 41 fixed on the top surface of the clamp top plate 2 by bolts, and the limiting block body 41 is provided with a workpiece top pressing protrusion 42 protruding from the side of the clamp top plate 2, and the workpiece top pressing protrusion 42 is provided with a 1.5-degree inclined surface matching the side surface angle, so that the workpiece can be locked and fixed.

[0037] The side extrusion clamp 5 includes a rectangular guide block 51 fixed on the top surface of the clamp top plate 2 by bolts, and the rectangular guide block 51 is hollow and provided with a bevel extrusion sliding block 52 inside, the bevel extrusion sliding block 52 is connected to a clamp pressing block 53 provided outside the rectangular guide block 51 through a connecting rod, the clamp pressing block 53 is provided with a V-shaped extrusion surface 54 matching the vertical side surface of the workpiece through hole 21, which is used for clamping and fixing the side surface of the workpiece, and the V-shaped extrusion surface 54 is also provided with a 1.5-degree inclined surface matching the outer side surface of the workpiece top plate A2, so that a downward clamping force is generated when the workpiece is clamped and fixed, and the workpiece is extruded and fixed; the bottom surface of the clamp top plate 2 is provided with an extrusion cylinder 55 below each rectangular guide block 51, the top end of the piston shaft of the extrusion cylinder 55 is provided with an extrusion wedge 56, the extrusion wedge 56 contacts the inclined surface of the bevel extrusion sliding block 52, and the axial movement of the bevel extrusion sliding block 52 and the clamp pressing block 53 is driven by the up and down movement of the extrusion wedge 56; in addition, a return spring 57 is arranged between the rear end of the bevel extrusion sliding block 52 and the rear side wall of the rectangular guide block 51, which is used for the return of the bevel extrusion sliding block 52 and the clamp pressing block 53.

[0038] In use, a raw workpiece is placed in the workpiece through hole 21, compressed air is introduced into the three cylinders to drive the pistons to move upward, and the bevel extrusion sliding block 52 and the clamp pressing block 53 are moved by the extrusion wedge 56, the clamp pressing block 53 extrudes and fixes the workpiece, so that the workpiece is fixed in the clamp, at this time the workpiece top plate A2 of the workpiece can be machined, and the work of a large circular hole A3 and three small circular holes A4 can be carried out; after machining, the pistons of the three cylinders move downward, and the extrusion wedge 56 moves downward, at the same time the bevel extrusion sliding block 52 and the clamp pressing block 53 move away from the workpiece under the action of the return spring 57, the machined workpiece is not extruded on the side positioning, so that the workpiece can be taken out from the clamp.

[0039] Although the embodiments of the present application have been shown and described, it is apparent that the described embodiments are only part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, it can be understood by those skilled in the art that, without departing from the principles and spirits of the present application, all other embodiments obtained by various changes, modifications, replacements and variations of these embodiments without creative labor belong to the protection scope of the present application.

Claims

1. A part-milling jig for die cast aluminium parts, characterised in that: The utility model provides a kind of workpiece clamping device, including lower clamp base plate (1) and upper clamp top plate (2) and multiple support columns (3) between two plates;The top surface of the clamp top plate (2) is provided with workpiece through hole (21), two annular support surfaces (22) are provided on the top surface of the clamp top plate (2) on the left side of the workpiece through hole (21), one annular support surface (22) is provided on the right side, and the workpiece is stably supported by three annular support surfaces (22), one side surface limiting block (4) is provided on the top surface of the clamp top plate (2) on the left side of the workpiece through hole (21), two side surface limiting blocks (4) are provided on the front side, one side surface extrusion clamp (5) is provided on the right side, and two side surface extrusion clamps (5) are provided on the rear side.

2. The die cast aluminum part portion-milling fixture of claim 1, wherein: The clamp base plate (1) is arranged in a rectangular shape and has multiple vertical support columns (3) arranged in a rectangular shape on the top surface near the edge, the top ends of the multiple support columns (3) are collectively provided with a clamp top plate (2) arranged in a rectangular shape, and the clamp top plate (2) and the support columns (3) are fixed by bolts.

3. The die cast aluminum part portion-milling fixture of claim 2, wherein: The clamp top plate (2) is provided with a circular hole (23) coaxial with the annular support surface (22), and the annular support surface (22) is installed and fixed by bolts on both sides of the circular hole (23).

4. The part-specific milling fixture for die cast aluminum parts of claim 3, wherein: The side surface limiting block (4) includes a limiting block body (41) fixed on the top surface of the clamp top plate (2) by bolts, and a workpiece pressing protrusion (42) is protrudingly arranged on the side of the limiting block body (41) close to the clamp top plate (2).

5. The die cast aluminum part portion-milling fixture of claim 4, wherein: The side surface extrusion clamp (5) includes a hollow rectangular guide block (51) fixed on the top surface of the clamp top plate (2) by bolts, the rectangular guide block (51) has an inclined extrusion sliding block (52) built-in, the inclined extrusion sliding block (52) is connected to a clamp pressing block (53) arranged outside the rectangular guide block (51) through a connecting rod on the side close to the workpiece through hole (21), the clamp pressing block (53) is provided with a V-shaped extrusion surface (54) on the vertical side close to the workpiece through hole (21), and the bottom surface of the clamp top plate (2) is provided with an extrusion cylinder (55) below each rectangular guide block (51), the extrusion cylinder (55) is provided with an extrusion wedge (56) at the top end of the piston shaft, and the extrusion wedge (56) is in contact with the inclined surface of the inclined extrusion sliding block (52).

6. The die cast aluminum part portion-milling fixture of claim 5, wherein: The workpiece pressing protrusion (42) is provided with an inclined surface with an angle of 1.5 degrees matching the side surface of the workpiece, and the V-shaped extrusion surface (54) is provided with an inclined surface with an angle of 1.5 degrees matching the outer side surface of the workpiece top plate.

7. The die cast aluminum part portion-milling fixture of claim 6, wherein: The rear end of the inclined extrusion sliding block (52) is provided with a return spring (57) between the rear side wall of the rectangular guide block (51).

Images