Clamping device for aluminum alloy die casting

Abstract

The utility model relates to the field of polishing, in particular to a clamping device for an aluminum alloy die casting. The clamping device for the aluminum alloy die casting comprises a cross beam, a plurality of clamping arms rotationally connected to the two sides of the cross beam through torsional springs and a connecting plate fixed to the cross beam, and the front end and the rear end of the connecting plate are slidably connected with side walls. The upper end of each clamping arm is provided with an upper section, and the inner side of the lower end of each clamping arm is provided with a tightening part. Each side wall is rotationally connected with a lead screw, the two lead screws are connected with sliding plates correspondingly, the sliding plates make surface contact with the side walls, and the inner ends of the sliding plates can push the multiple upper sections located on the same side in the front-back direction. The clamping device can clamp the casting and then immerse the casting into the pickling solution, and the clamping position is automatically replaced in the soaking process, so that pickling dead angles are avoided.

Description

Technical Field

[0001] The utility model relates to the field of polishing, and more specifically to a clamping device for aluminum alloy die-castings. Background Art

[0002] After die-casting aluminum alloy, it is necessary to polish the surface of the casting to improve the surface smoothness. In current processing methods, pickling and polishing requires clamping or hanging the casting and then immersing it in the pickling solution, so a fixture is needed to clamp the casting.

[0003] Among existing fixtures, for example, Chinese published patent document CN211305593U discloses a fixture for aluminum alloy processing, including a workbench, positioning columns and a base. The base is located below the workbench, and square grooves are opened on both the bottom of the workbench and the top surface of the base. A slide bar is arranged at both the front and rear ends of the inner wall of the square groove, and a double-rod hydraulic cylinder is fixed by screws between every two slide bars. The beneficial effect of the utility model lies in that: by setting the slide bar, connecting rod and double-rod hydraulic cylinder, it is convenient for the user to adjust the height of the workbench according to actual needs.

[0004] However, the clamping positions cannot fully contact the pickling solution, which easily leads to incomplete polishing and uneven polishing degree. Summary of the Utility Model

[0005] The utility model provides a grinding device for aluminum alloy die-castings, which can clamp the casting and immerse it in the pickling solution, and automatically change the clamping position during the soaking process, thereby avoiding the technical problem of pickling dead angles.

[0006] The technical solution adopted by the utility model to solve the above problems is as follows:

[0007] A clamping device for aluminum alloy die-castings includes a cross beam, a plurality of clamping arms rotatably connected to both sides of the cross beam through torsion springs, and a connecting plate fixed on the cross beam. The front and rear ends of the connecting plate are slidably connected with side walls. An upper section is arranged at the upper end of each clamping arm, and a clamping part is arranged at the inner side of the lower end of each clamping arm. A lead screw is rotatably connected to each side wall, and a slide plate is connected to the two lead screws respectively. The slide plate contacts the side wall and its inner end can push the plurality of upper sections on the same side in the front and rear directions.

[0008] Preferably, the clamping part is composed of two contact blocks sliding up and down with each other, and the contact block located on the upper side is detachably connected to the lower end of the clamping arm through a bolt.

[0009] Preferably, an anti-slip pad is fixedly connected to the inner side surface of the contact block.

[0010] Preferably, the inner side of the contact block is an inclined surface, and the inclined surfaces on the inner sides of the two contact blocks in the same clamping part are inclined from the upper and lower directions towards the middle of the two contact blocks respectively to form a recessed body.

[0011] Preferably, telescopic rods are fixedly connected to both the front and rear ends of the connecting plate, and the outer ends of the two telescopic rods are respectively fixedly connected to the side walls.

[0012] Preferably, sprockets are fixedly connected to the ends of both of the lead screws, the two sprockets are driven by a chain, a pull rod is slidably connected to the connecting plate, a spring is fixedly connected between the pull rod and the connecting plate, a tensioning wheel is rotatably connected to the lower end of the pull rod, and the tensioning wheel contacts the inner side of the chain.

[0013] Preferably, a reduction motor is detachably connected to one of the side walls, and the output shaft of the reduction motor is connected to the lead screw to drive the lead screw to rotate.

[0014] Preferably, the inner end of the sliding plate is of an arc-shaped structure.

[0015] Preferably, the anti-slip pad is made of an elastic material.

[0016] Preferably, both the upper section and the sliding plate are made of wear-resistant materials.

[0017] The beneficial effects of the present utility model are as follows:

[0018] 1. Through the reciprocating movement of the sliding plate, multiple sets of clamping arms for clamping the aluminum alloy casting are sequentially opened, and the multiple sets of clamping arms clamp the aluminum alloy casting in an orderly manner, which can avoid the clamping position from not being polished when the aluminum alloy casting is always in the pickling solution;

[0019] 2. By changing the distance between the two contact blocks, the clamping range is adjusted, so as to select a suitable position for clamping according to the size of the casting. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 and Figure 2 is a schematic structural diagram of a clamping device for aluminum alloy die castings;

[0021] Figure 3 is a schematic structural diagram of a clamping arm;

[0022] Figure 4 is a schematic structural diagram of a contact block;

[0023] Figure 5 is a schematic structural diagram of a lead screw;

[0024] Figure 6It is a schematic structural diagram of a skateboard.

[0025] In the figure:

[0026] 01, cross beam; 02, clamping arm; 03, upper section; 04, contact block; 05, anti-slip pad; 06, connecting plate; 07, telescopic rod; 08, side wall; 09, lead screw; 10, skateboard; 11, sprocket; 12, pull rod; 13, tensioning wheel. Detailed implementation manners

[0027] Among them, the attached drawings are only for illustrative purposes, showing only schematic diagrams, rather than physical diagrams, and should not be construed as a limitation to this patent; in order to better illustrate the embodiments of the present invention, some components in the attached drawings will be omitted, enlarged or reduced, which does not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the attached drawings may be omitted.

[0028] In the attached drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that if terms such as "upper", "lower", "left", "right", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the attached drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms used to describe the positional relationship in the attached drawings are only for illustrative purposes and should not be construed as a limitation to this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0029] In the description of the present invention, unless otherwise clearly defined and limited, if terms such as "connection" are used to indicate the connection relationship between components, this term should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Referring to Figures 1 to 6 in the attached drawings of the specification, an embodiment in which the clamping position can be converted in the present utility model can be observed from the figure.

[0031] A clamping device for an aluminum alloy die-casting includes a cross beam 01, a plurality of clamping arms 02 rotatably connected to both sides of the cross beam 01 through torsion springs, and a connecting plate 06 fixed on the cross beam 01. Both the front and rear ends of the connecting plate 06 are slidably connected with side walls 08. An upper section 03 is provided at the upper end of each clamping arm 02, and a clamping portion is provided inside the lower end of each clamping arm 02. A lead screw 09 is rotatably connected to each side wall 08. Two lead screws 09 are respectively connected with slide plates 10. The slide plates 10 are in surface contact with the side walls 08 and the inner ends thereof can push the plurality of upper sections 03 on the same side in the front-back direction.

[0032] Use bolts to connect the connecting plate 06 to the lifting equipment, place the die-cast aluminum alloy casting under the cross beam 01, and then press inward on the plurality of upper sections 03 to drive the plurality of clamping arms 02 to rotate simultaneously. At this time, the torsion springs at the rotational joints of the clamping arms 02 and the cross beam 01 are stretched, so as to drive the clamping portions at the lower ends of the plurality of clamping arms 02 to move. And the clamping portions on the front and rear sides of the cross beam 01 move away from each other, and then drive the cross beam 01 to descend, so that the clamping portions on the front and rear sides of the cross beam 01 move to the front and rear sides of the aluminum alloy casting. Then release the plurality of upper sections 03, and when the torsion springs contract and reset, the plurality of clamping arms 02 on the front and rear sides of the cross beam 01 can be made to approach each other, and finally the clamping portions on the front and rear sides of the cross beam 01 clamp the aluminum alloy casting from the front and rear sides. Then, by moving the connecting plate 06, the aluminum alloy casting clamped under the cross beam 01 can be immersed in the pickling solution.

[0033] Then, by driving the two lead screws 09 to rotate synchronously and reciprocally, the two slide plates 10 can be moved along the horizontal direction. When the inner ends of the slide plates 10 pass by the plurality of upper sections 03 on the same side, the plurality of upper sections 03 can be pushed towards the direction close to the cross beam 01, so as to drive the corresponding clamping arms 02 to rotate and open, so that the clamping portions at the lower ends of the clamping arms 02 leave the aluminum alloy casting, and the pickling solution can polish the part of the aluminum alloy casting blocked by the clamping portion. When the two slide plates 10 reciprocate, the two corresponding clamping arms 02 in the front and back can be loosened from the clamped state. The continuous rotation between the plurality of clamping arms 02 is used to polish all the surfaces of the aluminum alloy casting with the pickling solution, avoiding the problem that the clamping position in the traditional equipment cannot be treated by the pickling solution because the clamping position cannot be changed.

[0034] Referring to Figures 1 to 6 in the attached drawings of the specification, an embodiment in which the clamping range can be adjusted in the present invention can be observed from the figures.

[0035] The clamping part is composed of two contact blocks 04 that slide up and down relative to each other. The upper contact block 04 is detachably connected to the lower end of the clamping arm 02 by bolts. By driving the lower contact block 04 to move up and down, the distance between the two contact blocks 04 can be changed, so that when the clamping part contacts the aluminum alloy casting for clamping, the clamping range can be changed according to the size of the aluminum alloy casting, thereby improving the clamping stability of the aluminum alloy casting.

[0036] Referring to the Figures 1 to 6 in the accompanying drawings of the specification, an embodiment of improving the clamping force in the present invention can be observed from the figure.

[0037] An anti-slip pad 05 is fixedly connected to the inner side surface of the contact block 04; the anti-slip pad 05 is a superordinate concept, that is, any material that can contact the aluminum alloy casting and increase the friction force with the surface of the aluminum alloy casting is acceptable. For example, a wear-resistant pad with a frosted surface or a rubber pad can increase the friction force with the aluminum alloy casting, thereby improving the clamping force when clamping the aluminum alloy casting and preventing the aluminum alloy casting from falling.

[0038] Referring to the Figures 1 to 6 in the accompanying drawings of the specification, an embodiment of being able to clamp a cylindrical casting in the present invention can be observed from the figure.

[0039] The inner side surface of the contact block 04 is an inclined surface, and the inclined surfaces on the inner sides of the two contact blocks 04 in the same clamping part are inclined from the upper and lower directions towards the middle of the two contact blocks 04 to form a depression. Place the cylindrical casting flat and make the axis of the cylindrical casting parallel to the cross beam 01. Then, when the two contact blocks 04 contact the cylindrical casting, a part of the arc of the cylindrical casting can enter the depression, and the cylindrical casting can be clamped by using the depression to prevent the cylindrical casting from falling, and the specifications and types of clamping aluminum alloy castings can be increased.

[0040] Referring to the Figures 1 to 6 in the accompanying drawings of the specification, an embodiment of being able to automatically clamp an aluminum alloy casting in the present invention can be observed from the figure.

[0041] Both the front and rear ends of the connecting plate 06 are fixedly connected with telescopic rods 07. The outer ends of the two telescopic rods 07 are respectively fixedly connected to the side walls 08. By energizing the telescopic rods 07, the telescopic rods 07 drive the side walls 08 to move, enabling the two side walls 08 to approach or move away from each other. When approaching each other, the two side walls 08 can push the corresponding multiple upper segments 03 from the front and rear sides, so that the multiple clamping arms 02 are opened. After moving to the aluminum alloy casting, when the two side walls 08 move away from each other, the multiple clamping arms 02 can rotate and close to clamp the aluminum alloy casting.

[0042] Referring to the Figures 1 to 6, an embodiment capable of maintaining synchronization in the present utility model can be observed from the figure.

[0043] Both ends of the two lead screws 09 are fixedly connected with sprockets 11. The two sprockets 11 are driven by a chain. A pull rod 12 is slidably connected to the connecting plate 06, and a spring is fixedly connected between the pull rod 12 and the connecting plate 06. The lower end of the pull rod 12 is rotatably connected with a tensioning wheel 13, and the tensioning wheel 13 contacts the inner side of the chain. A reduction motor is detachably connected to one of the side walls 08, and the output shaft of the reduction motor is connected to the lead screw 09 and can drive the lead screw 09 to rotate. When the reduction motor drives one of the lead screws 09 to rotate, the lead screw 09 can drive the sprocket 11 fixed thereon to rotate, and the other sprocket 11 is driven by the chain, so as to realize the synchronous rotation of the two lead screws 09, and the two sliding plates 10 can be synchronously moved. Each time, the two corresponding clamping arms 02 in the same group are opened. When the two side walls 08 approach each other, the pull rod 12 is pushed upward under the action of the spring, so that the tensioning wheel 13 pulls the chain upward from the inner side, so that the chain is always kept taut, and the chain is prevented from falling off due to the reduction of the distance between the two sprockets 11.

[0044] Referring to Figures 1 to 6 , an embodiment capable of reducing losses in the present utility model can be observed from the figure.

[0045] The inner end of the sliding plate 10 is of an arc-shaped structure. When the inner end of the sliding plate 10 contacts the upper section 03, the upper section 03 can smoothly contact the sliding plate 10, reducing the contact area between the sliding plate 10 and the upper section 03, and reducing the losses caused by mutual friction.

[0046] In addition, both the upper section 03 and the sliding plate 10 are made of wear-resistant materials, which can further reduce the frictional loss and extend the service life.

[0047] Referring to Figures 1 to 6 , an embodiment capable of maintaining synchronization in the present utility model can be observed from the figure.

[0048] The anti-slip pad 05 is made of an elastic material, which can increase the friction between the anti-slip pad 05 and the surface of the aluminum alloy casting through the elastic deformation of the elastic material, and at the same time prevent the anti-slip pad 05 from scratching the aluminum alloy casting; it solves the problem that the hard fixture in the traditional equipment damages the surface of the aluminum alloy casting.

[0049] Other embodiments of the present invention will be readily apparent to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the invention following the general principles of the invention and including known or customary techniques in the art not disclosed herein. The specification and examples are only to be considered as exemplary, and the true scope and spirit of the invention are pointed out by the following claims.

[0050] It should be understood that the present invention is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present invention is only limited by the appended claims.

Claims

1. A clamping device for aluminum alloy die-castings, characterized in that: It includes a cross beam (01), a plurality of clamping arms (02) rotatably connected to both sides of the cross beam (01) through torsion springs, and a connecting plate (06) fixed on the cross beam (01). Side walls (08) are slidably connected to both the front and rear ends of the connecting plate (06). An upper section (03) is provided at the upper end of each clamping arm (02), and a clamping portion is provided inside the lower end of each clamping arm (02). A lead screw (09) is rotatably connected to each side wall (08). Slide plates (10) are respectively connected to the two lead screws (09). The slide plates (10) are in surface contact with the side walls (08) and the inner ends thereof can push the plurality of upper sections (03) on the same side in the front-rear direction.

2. The clamping device for aluminum alloy die-castings according to claim 1, characterized in that: The clamping portion is composed of two contact blocks (04) sliding up and down with respect to each other. The contact block (04) located on the upper side is detachably connected to the lower end of the clamping arm (02) by bolts.

3. The clamping device for aluminum alloy die-castings according to claim 2, characterized in that: An anti-slip pad (05) is fixedly connected to the inner side surface of the contact block (04).

4. The clamping device for aluminum alloy die-castings according to claim 3, characterized in that: The inner side surface of the contact block (04) is an inclined surface, and the inclined surfaces of the two contact blocks (04) in the same clamping portion are inclined from the upper and lower directions towards the middle of the two contact blocks (04) respectively to form a depression.

5. The clamping device for aluminum alloy die-castings according to claim 1, characterized in that: Both the front and rear ends of the connecting plate (06) are fixedly connected with telescopic rods (07), and the outer ends of the two telescopic rods (07) are respectively fixedly connected to the side walls (08).

6. The clamping device for aluminum alloy die-castings according to claim 5, characterized in that: Both ends of the two lead screws (09) are fixedly connected with sprockets (11). The two sprockets (11) are driven by a chain. A pull rod (12) is slidably connected to the connecting plate (06), and a spring is fixedly connected between the pull rod (12) and the connecting plate (06). The lower end of the pull rod (12) is rotatably connected with a tension pulley (13), and the tension pulley (13) contacts the inner side of the chain.

7. The clamping device for aluminum alloy die-castings according to claim 6, characterized in that: A reduction motor is detachably connected to one of the side walls (08), and the output shaft of the reduction motor is connected to the lead screw (09) and can drive the lead screw (09) to rotate.

8. The clamping device for aluminum alloy die-castings according to claim 1, characterized in that: The inner end of the slide plate (10) is of an arc-shaped structure.

9. The clamping device for aluminum alloy die-castings according to claim 3, characterized in that: The anti-slip pad (05) is made of an elastic material.

10. The clamping device for aluminum alloy die-castings according to claim 1, characterized in that: Both the upper section (03) and the slide plate (10) are made of wear-resistant materials.

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