Steering knuckle spherical surface machining reaming and ball drill compound tool

Abstract

The utility model discloses a reaming and ball drilling compound tool for machining a spherical surface of a steering knuckle, and relates to the technical field of machining tools. The cutter is provided with a cylindrical cutter body, a spherical body and a guide rod are integrally formed at the end of the cutter body in sequence, and the diameter of the cutter body, the maximum diameter of the spherical body and the maximum diameter of the guide rod are gradually reduced in sequence; the axis of the cutter body, the sphere center of the spherical body and the axis of the guide rod are all located on the same straight line. The spherical body is provided with an arc-shaped cutting edge for processing a spherical surface; the guide rod is provided with a cutting part; the cutting part comprises a cutting edge used for cutting materials, and the cutting edge is arranged outwards in the radial direction of the guide rod. The spherical body is arranged on the cutter body, the cutter body is firstly punched, then the spherical surface is machined through the spherical body, and the machining precision is higher. By changing the diameter of the cutter body, the machining allowance is increased, so that errors caused by the fact that equipment rotates the cutter body in the machining process are avoided, and dependence on the rotating precision of the equipment is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of machining tools, in particular to a ball drill composite tool for machining the spherical surface of a steering knuckle. Background Art

[0002] The steering knuckle, also known as the horn, is one of the important parts of the steering axle of the car. It can make the car run stably and transmit the driving direction sensitively. The function of the steering knuckle is to transmit and bear the front load of the car, support and drive the front wheel to rotate around the kingpin to make the car turn.

[0003] A countersink drill is a drill used to countersink conical holes. It can be used to remove burrs, chamfer, and dig countersunk holes. The prerequisite is that there must be a guide hole for subsequent processing. The tapered conical hole is larger at the top and smaller at the bottom.

[0004] Tools are tools used for cutting in mechanical manufacturing. Most tools are machine-made, but some are hand-made. Since tools used in mechanical manufacturing are basically used to cut metal materials, tools can be understood as metal cutting tools. The tool used for countersinking on the spherical surface of the steering knuckle is a composite tool for countersinking and ball drilling on the spherical surface of the steering knuckle.

[0005] Nowadays, when machining the spherical surface of the steering knuckle, the tool needs to make the hole concentric with the spherical surface. However, in the actual machining process, due to the design of the tool itself, the tool will deviate during the machining process, and finally make the hole not concentric with the spherical surface. Utility Model Content

[0006] In order to solve the above technical problems, the utility model provides a ball drill composite tool for machining the spherical surface of a steering knuckle, which is used to solve the problem of the tool and the spherical surface being non-concentric during the production process.

[0007] The technical solution of the utility model is: a composite tool for countersinking and ream-hammering a steering knuckle spherical surface, comprising a cylindrical tool body, the ends of which are integrally formed with a spherical body and a guide rod in sequence, the diameter of the tool body, the maximum diameter of the spherical body and the maximum diameter of the guide rod gradually decrease in sequence; the axis of the tool body, the center of the spherical body and the axis of the guide rod are all located on the same straight line; the spherical body is provided with an arc-shaped cutting edge for processing the spherical surface; the guide rod has a cutting portion; the cutting portion includes a cutting edge for cutting material, and the cutting edge is arranged radially outward along the guide rod.

[0008] Furthermore, a chip breaker groove is provided on the spherical body and an arc-shaped cutting edge is arranged in the chip breaker groove.

[0009] Furthermore, a replaceable cutting blade is installed on the inner wall of the chip breaker groove located at the arc-shaped cutting edge.

[0010] Furthermore, a cutting groove is formed at the end of the guide rod and the cutting edge is located in the cutting groove.

[0011] Furthermore, the tool body is provided with a chip discharge groove for discharging the chips in the chip breaker groove, and the chip discharge groove is communicated with the chip breaker groove.

[0012] Furthermore, a support belt is formed on the guide rod and is arranged axially along the guide rod; and a cross-sectional diameter of the support belt is larger than a cross-sectional diameter of the guide rod.

[0013] Furthermore, a center hole is provided at the axis of the knife body and the guide rod.

[0014] Furthermore, a plurality of drainage holes connected with the central hole are provided on the spherical surface of the spherical body, the inner wall of the chip breaker groove and the inner wall of the chip discharge groove.

[0015] The beneficial technical effects of the utility model are:

[0016] A spherical body is arranged on the cutter body, a hole is first punched through the cutter body, and then the spherical surface is processed through the spherical body, so that the processing accuracy is higher.

[0017] By changing the diameter of the cutter body, the machining allowance becomes larger, thereby avoiding the error caused by the rotation of the cutter body by the equipment during the machining process, and breaking away from the reliance on the rotation accuracy of the equipment.

[0018] Support belts are arranged on both side surfaces of the cutter body so that during the machining process of the cutter body, the support belts can abut against the hole wall, thereby increasing the stability of the cutter body during the machining process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a side view of the composite tool for countersinking and drilling the spherical surface of a steering knuckle of the utility model;

[0020] Figure 2 It is a bottom view of the composite tool for countersinking and drilling the spherical surface of the steering knuckle of the utility model;

[0021] Figure 3 yes Figure 1 A partial enlarged view of point A in the middle.

[0022] Among them, 100, blade body;

[0023] 200. Sphere;

[0024] 300, guide rod;

[0025] 400, cutting portion; 410, cutting edge; 420, cutting groove; 430, chip breaker groove; 431, arc cutting edge; 432, cutting blade; 440, chip removal groove;

[0026] 500, support belt;

[0027] 600, center hole; 610, drainage hole; 620, flow channel. DETAILED DESCRIPTION

[0028] In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the specific implementation methods of the utility model are further described in detail below in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0029] This specific embodiment relates to a composite tool for machining the spherical surface of a steering knuckle and countersinking a ball drill, such as Figure 1 As shown, it includes a cutter body 100, which is cylindrical. The end of the cutter body 100 is integrally formed with a spherical body 200 and a guide rod 300, and the spherical body 200 is hemispherical. The diameter of the cutter body 100, the maximum diameter of the spherical body 200, and the maximum diameter of the guide rod 300 gradually decrease in sequence. The axis of the cutter body 100, the center of the spherical body 200, and the axis of the guide rod 300 are all located on the same straight line to ensure the concentricity between the guide rod 300, the spherical body 200, and the cutter body 100. At the same time, the guide rod 300 and the spherical body 200 can rotate along the axis of the cutter body 100 during the processing, thereby ensuring the stability of the spherical body 200 in the process of cutting into a spherical surface and the stability of the guide rod 300 in the process of cutting into a hole.

[0030] like Figures 1 to 3 As shown, the spherical body 200 is provided with a chip breaker groove 430, and the number of the chip breaker grooves 430 is two and they are arranged symmetrically with respect to the center axis of the cutter body 100. The spherical body 200 located at the chip breaker groove 430 is provided with an arc-shaped cutting edge 431 for chip breaking. The arc-shaped cutting edge 431 is arranged radially outwardly along the guide rod 300 to facilitate the processing and forming of the spherical surface. A replaceable cutting blade 432 is installed on the inner wall of the chip breaker groove 430 located at the arc-shaped cutting edge 431. During long-term use, the arc-shaped cutting edge 431 will be worn. In order to prevent the arc-shaped cutting edge 431 from being worn, the cutting blade 432 needs to be installed in the chip breaker groove 430 by screws. In this way, the cutting blade 432 is worn. When the cutting blade 432 is worn, the cutting blade 432 can be replaced, thereby reducing the production cost. The cutter body 100 is provided with a chip discharge groove 440 for discharging the chips in the chip breaker groove 430, and the chip discharge groove 440 is connected to the chip breaker groove 430. The chip discharge groove 440 is used to discharge the chips generated by machining the spherical body 200.

[0031] like Figure 1As shown, a guide rod 300 is arranged on the spherical surface of the spherical body 200, and the guide rod 300 will abut against the hole wall during the processing, thereby guiding the direction of the cutter body 100. A support belt 500 is formed on the guide rod 300 and arranged along the axial direction of the guide rod 300. During the process of cutting holes by this tool, the guide rod 300 will contact the cut material, and then the cut material will be cut into a hole, and the guide rod 300 will penetrate into the hole. The main function of the support belt 500 is: when reaming, the guide rod 300 forms a lateral support force and fits with the hole wall in the form of hard contact. At this time, the support belt 500 stabilizes the slight side swing formed by the uneven force on the shoulders during processing. When the spherical body 200 is processed to form a spherical surface, the cutting resistance increases at this time, causing the guide rod 300 to vibrate during the rotation process, and the support belt 500 also plays a stabilizing role. The cross-sectional diameter of the support belt 500 is larger than the cross-sectional diameter of the guide rod 300, so that the gap between the support belt 500 and the hole is very small. During the process of cutting holes, there will be debris of the cut material in the hole, and these debris will be pushed out of the hole by the support belt 500, thereby preventing the debris from being retained in the hole.

[0032] like Figure 1 and Figure 2 As shown, the guide rod 300 punches a hole in the material to be cut through the cutting portion 400. The cutting portion 400 includes a cutting edge 410 for cutting the material, and a cutting groove 420 is provided at the end of the guide rod 300 and the cutting edge 410 is located in the cutting groove 420. The cutting edge of the cutting edge 410 is located at the outermost side of the guide rod 300. There are two cutting grooves 420 and they are evenly distributed on the outer peripheral wall of the guide rod 300. The cutting edge 410 is arranged radially outwardly of the guide rod 300 to ensure that the contact surface between the cutting edge 410 and the hole wall is small during the cutting process, so as to improve the sharpness of the cutting edge 410.

[0033] like Figures 1 to 3 As shown, a center hole 600 for drainage is provided at the axis of the cutter body 100 and the guide rod 300. An opening for transporting coolant can be provided at the root of the cutter body 100, and the opening is connected to the center hole 600, so that the cutting fluid can be ejected through the center hole 600. A plurality of drainage holes 610 connected to the center hole 600 are provided on the spherical surface of the spherical body 200, the inner wall of the chip breaker groove 430, and the inner wall of the chip removal groove 440. There are two drainage holes 610 on the spherical body 200, and a flow channel 620 is formed between the drainage hole 610 and the chip breaker groove 430, and the flow channel 620 is provided on the surface of the spherical body 200.

[0034] Working principle: The cutter body 100 is moved by the device until the guide rod 300 contacts the material to be processed. The guide rod 300 rotates continuously, and the cutting portion 400 on the guide rod 300 opens a hole in the material to be processed. Then the cutter body 100 is rotated by the device, and the cutter body 100 is rotated 180° until the cutter body 100 moves to the back of the material to be processed. From the back of the material to be processed, the guide rod 300 is extended into the hole, and at the same time, the spherical body 200 contacts the back of the material to be processed, thereby processing a spherical surface on the back of the material to be processed.

[0035] The improvement of this specific embodiment is that the prior art uses a guide rod 300 with a diameter of 12.734 mm to process a hole with a tolerance requirement of 12.6+0.2 mm. However, there is a rotation positioning error of 0.009 divisions in the process of the device rotating from 0° to 180°. Under the influence of this error, the actual produced hole diameter is not within the requirement and is offset. In this way, the concentricity between the formed hole and the processed spherical surface does not meet the production requirements.

[0036] In this regard, the diameter of the guide rod 300 in this specific embodiment is changed to 12.654 mm, so that a diameter of 0.314 mm can be reserved for finishing, thereby solving the above-mentioned concentricity problem.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as within the protection scope of the present invention.

Claims

1. A ball drill composite tool for machining the spherical surface of a steering knuckle, characterized in that: The invention comprises a cylindrical blade body (100), the end of the blade body (100) being integrally formed with a spherical body (200) and a guide rod (300) in sequence, the diameter of the blade body (100), the maximum diameter of the spherical body (200) and the maximum diameter of the guide rod (300) gradually decreasing in sequence; the axis of the blade body (100), the center of the spherical body (200) and the axis of the guide rod (300) are all located on the same straight line; The spherical body (200) is provided with an arc-shaped cutting edge (431) for machining the spherical surface; The guide rod (300) has a cutting portion (400); the cutting portion (400) includes a cutting edge (410) for cutting materials, and the cutting edge (410) is arranged radially outward of the guide rod (300).

2. The ball drill composite tool for countersinking the spherical surface of the steering knuckle according to claim 1 is characterized in that: The spherical body (200) is provided with a chip breaker groove (430), and the arc-shaped cutting edge (431) is arranged in the chip breaker groove (430).

3. The ball drill composite tool for countersinking the spherical surface of the steering knuckle according to claim 2, characterized in that: A replaceable cutting blade (432) is installed on the inner wall of the chip breaker groove (430) located at the arc-shaped cutting edge (431).

4. The ball drill composite tool for countersinking the spherical surface of the steering knuckle according to claim 1, characterized in that: A cutting groove (420) is provided at the end of the guide rod (300), and the cutting edge (410) is located in the cutting groove (420).

5. The ball drill composite tool for countersinking the spherical surface of the steering knuckle according to claim 1, characterized in that: The cutter body (100) is provided with a chip removal groove (440) for discharging chips in the chip breaker groove (430), and the chip removal groove (440) is connected to the chip breaker groove (430).

6. The ball drill composite tool for countersinking the spherical surface of the steering knuckle according to claim 1, characterized in that: The guide rod (300) is formed with a support belt (500) arranged axially along the guide rod (300); the cross-sectional diameter of the support belt (500) is greater than the cross-sectional diameter of the guide rod (300).

7. The ball drill composite tool for countersinking the spherical surface of the steering knuckle according to claim 1, characterized in that: A central hole (600) is provided at the axis of the knife body (100) and the guide rod (300).

8. The ball drill composite tool for countersinking the spherical surface of the steering knuckle according to claim 7, characterized in that: A plurality of drainage holes (610) connected to the central hole (600) are provided on the spherical surface of the spherical body (200), the inner wall of the chip breaker groove (430) and the inner wall of the chip discharge groove (440).

Images