Polishing tool for automobile steering knuckle casting

Abstract

The polishing tool for the automobile steering knuckle casting comprises a supporting frame, a horizontal base plate is arranged at the top of the supporting frame, a center column is installed in the middle of the top face of the base plate and matched with a shaft hole of a steering knuckle, and the positions, corresponding to three supporting feet of the steering knuckle, of the top face of the base plate are each provided with a supporting block. The top face of each supporting block is provided with a positioning protrusion or a positioning groove, the positioning protrusions or the positioning grooves are matched with the outlines of the bottom faces of the corresponding supporting feet, and a detachable gland is installed on the top of the center column and used for pressing a workpiece. The grinding device is matched with an automatic grinding mechanical arm, the grinding efficiency of the steering knuckle casting is improved, and operation is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of casting, in particular to a grinding tooling for automobile steering knuckle castings. Background Technique

[0002] The steering knuckle, also known as the "sheep's horn", is one of the important parts in the automobile steering axle. It can make the automobile drive stably and transmit the driving direction sensitively. It can transmit and bear the load at the front of the automobile, support and drive the front wheels to rotate around the kingpin to make the automobile turn; when the automobile is in a driving state, it bears variable impact loads to ensure driving safety.

[0003] The structural forms of automobile steering knuckles are diverse, and they are mainly produced by casting. There will be some burrs on the surface of the casting products, which cannot meet the customer's requirements. It is necessary to grind the surface of the casting. The grinding work has a large labor intensity, the on-site environment is harsh, and it is difficult to recruit workers, so it is impossible to ensure timely supply to the market. And when using an automated robotic arm device for grinding, a special grinding tooling is required. Currently, there is no grinding tooling dedicated to steering knuckles. Therefore, it is necessary to design a grinding tooling dedicated to steering knuckles with a simple structure and convenient use. Summary of the Invention

[0004] The purpose of the utility model is to solve the problems existing in the above-mentioned prior art, and provide a grinding tooling for automobile steering knuckle castings.

[0005] The specific scheme of the utility model is: a grinding tooling for automobile steering knuckle castings, including a support frame. A horizontal substrate is provided at the top of the support frame. A central column is installed in the middle of the top surface of the substrate. The central column matches the shaft hole of the steering knuckle. At each of the three support feet of the steering knuckle corresponding to the top surface of the substrate, a support block is installed. A positioning protrusion or a positioning groove is provided on the top surface of the support block, and the positioning protrusion or the positioning groove matches the bottom contour of the corresponding support foot. A detachable pressing cover is installed at the top of the central column, and the pressing cover is used to press the workpiece.

[0006] Further, a support rod is installed at each of the ear lugs of the steering knuckle corresponding to the top surface of the substrate.

[0007] Further, the support rod includes a bolt and a locking nut. Through holes are provided on the substrate corresponding to the support rods. The bolt passes through the through holes and locking nuts are installed on both sides of the substrate. The support height of the bolt is adjusted by the locking nuts.

[0008] Further, threaded holes are provided at the bottom surfaces of the support blocks, and waist-shaped holes are provided on the substrate corresponding to the threaded holes of each support block. The support blocks are fixedly connected to the substrate by screws.

[0009] Further, three kidney-shaped holes are provided on the substrate corresponding to each support block, and the connection lines between the three kidney-shaped holes form a triangle. The long axes of the three kidney-shaped holes corresponding to each support block are arranged parallel to each other.

[0010] Further, the interior of the central column is a hollow structure.

[0011] The utility model has the following advantages compared with the prior art: 1. By utilizing the characteristics of the external dimensions of the casting itself, multiple fulcrums are designed, and the casting can be placed completely stably on the tooling, so as to accurately position the casting and perfectly cooperate with the automatic grinding equipment; 2. The kidney-shaped holes are designed on the substrate and are installed in cooperation with each support block, so that the relative positions of the support blocks can be adjusted, avoiding the problem that the workpiece cannot be installed due to inconsistent casting dimensions before grinding. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a three-dimensional structural schematic diagram of the utility model;

[0013] Figure 2 is a schematic diagram of the steering knuckle fixed on the tooling of the utility model;

[0014] Figure 3 is Figure 2 the top view of

[0015] Figure 4 is Figure 3 the A-A view of

[0016] Figure 5 is Figure 3 the B-B view of

[0017] Figure 6 is Figure 4 the C-C view of

[0018] In the figure: 1. Support frame; 2. Substrate; 3. Support rod; 4. Support block A; 41. Positioning groove; 5. Support block B; 51. Positioning protrusion; 6. Central column; 7. Pressing cover; 8. Kidney-shaped hole; 9. Workpiece. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Referring to Figures 1-6 , this embodiment is a grinding tooling for an automotive steering knuckle casting, including a support frame 1. A horizontal substrate 2 is provided at the top of the support frame 1. A central column 6 is installed in the middle of the top surface of the substrate 2. The central column 6 matches the shaft hole of the steering knuckle. A support block is installed at each of the three feet of the steering knuckle corresponding to the top surface of the substrate 2. A positioning protrusion 51 or a positioning groove 41 is provided on the top surface of the support block. The positioning protrusion 51 or the positioning groove 41 matches the bottom contour of the corresponding foot. A detachable pressing cover 7 is installed at the top of the central column 6. The pressing cover 7 is used to press the workpiece 9.

[0020] Further, a support rod 3 is installed on the top surface of the substrate 2 corresponding to the lug of the knuckle.

[0021] Further, the support rod 3 includes a bolt and a locking nut. A through hole is provided on the substrate 2 corresponding to the support rod 3. The bolt passes through the through hole and locking nuts are installed on both sides of the substrate 2. The support height of the bolt is adjusted by the locking nut so as to adapt to the workpiece 9.

[0022] Further, threaded holes are provided on the bottom surfaces of the support blocks. Slots 8 are provided on the substrate 2 corresponding to the threaded holes of the support blocks. The support blocks are fixedly connected to the substrate 2 by screws.

[0023] Further, three slots 8 are provided on the substrate 2 corresponding to each support block. The connection lines between the three slots 8 form a triangle. The long axes of the three slots 8 corresponding to each support block are arranged in parallel, so that each positioning block can only translate along the long axis direction of the slot 8; thus adapting to the workpiece 9 with out-of-tolerance dimensions.

[0024] Further, the interior of the central column 6 is a hollow structure, thereby reducing the weight of the tooling.

[0025] When the utility model works, the support frame 1 is fixedly installed at the working position of the grinding robotic arm, and then the knuckle is sleeved on the central column 6 from top to bottom, so that the three feet are respectively in contact with the corresponding support blocks to realize positioning. If the dimensions of the workpiece 9 are locally out of tolerance and accurate positioning cannot be achieved, the position of the corresponding support block can be adjusted to adapt to the workpiece 9; after the workpiece 9 is placed, the gland 7 is pressed against the workpiece 9. When the grinding robotic arm works, an auxiliary pressing mechanism presses against the top surface of the gland 7, thereby completely pressing and positioning the workpiece 9. At this time, the robotic arm grinds the surface of the knuckle according to the set program.

Claims

1. A grinding tool for automobile steering knuckle castings, characterized by: It includes a support frame, a horizontal base plate is provided on the top of the support frame, a center column is installed in the middle of the top surface of the base plate, the center column matches the axial hole of the steering knuckle, a support block is installed at each of the three supporting feet corresponding to the steering knuckle on the top surface of the base plate, a positioning protrusion or a positioning groove is provided on the top surface of the support block, the positioning protrusion or the positioning groove matches the bottom surface contour of the corresponding supporting foot, and a detachable pressure cover is installed on the top of the center column, which is used to press the workpiece.

2. The grinding tool for automobile steering knuckle casting according to claim 1 is characterized in that: A supporting rod is respectively arranged at the top surface of the base plate corresponding to the supporting ears of the steering knuckle.

3. The grinding tool for automobile steering knuckle casting according to claim 2 is characterized in that: The support rod includes a bolt and a locking nut. The base plate is provided with a through hole corresponding to the support rod. The bolt passes through the through hole and locking nuts are installed on both sides of the base plate. The supporting height of the bolt is adjusted by the locking nut.

4. The grinding tool for automobile steering knuckle casting according to claim 1 is characterized in that: The bottom surfaces of the support blocks are all provided with threaded holes, and waist-shaped holes are provided on the base plate corresponding to the threaded holes of each support block, and the support blocks are fixedly connected to the base plate by screws.

5. The grinding tool for automobile steering knuckle casting according to claim 4 is characterized in that: The base plate is provided with three waist-shaped holes corresponding to each supporting block, the connecting line between the three waist-shaped holes is a triangle, and the long axes of the three waist-shaped holes corresponding to each supporting block are arranged parallel to each other.

6. The grinding tool for automobile steering knuckle casting according to claim 1 is characterized in that: The interior of the central column is a hollow structure.

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