High-stability center positioning device for hub turning

Abstract

The high-stability center positioning device comprises an oil pressure clamping jaw, a supporting plate is arranged on one face of the oil pressure clamping jaw, a pulling jaw is arranged at the tail end of the oil pressure clamping jaw, a main shaft is arranged on the supporting plate, a spring is arranged on the main shaft, a chuck baffle is arranged at one end of the spring, and a center chuck is arranged on the chuck baffle. The hub turning device has the advantages that when a hub is turned, stability is improved, the hub is firmly fixed, jumping and vibration cannot be generated in the rotating cutting process, product rotating fluctuation change in the machining process is reduced, cutting paths cannot be increased due to hub jumping in cutter cutting, and cutter loss is reduced.

Description

Technical Field

[0001] The utility model relates to the field of wheel hub processing, in particular to a high-stability center positioning device for wheel hub turning. Background Art

[0002] The wheel hub is the part on the vehicle where the wheel is mounted, also known as the wheel bearing. It is usually made of metal material, has a round shape, and has a hollow hole in the middle, which is used to be mounted on the axle of the vehicle. The main function of the wheel hub is to support the weight of the vehicle and enable the wheel to rotate freely through the bearing. The processing procedures of the wheel hub generally include casting, cutting, rough machining, fine machining, surface treatment, inspection, and assembly.

[0003] After the wheel hub enters the rough processing process from cutting and forming, it is necessary to use a CNC machine tool to turn the inner and outer circles of the wheel hub, that is, to cut the inner and outer circles of the wheel hub to meet the specified size specifications. The existing CNC machine tool adopts three-jaw outer diameter clamping to fix the product processing when clamping the wheel hub. However, during the processing, due to the product length problem, the clamping position of the wheel hub and the rotation runout value of the end of the wheel hub are quite different during the processing, resulting in the following problems: 1. When the wheel hub is clamped and rotated for turning, the wheel hub and the clamping jaws are not parallel, that is, there is an angle deviation, which causes the wheel hub to tilt at a certain angle. During turning, the difference in the front and rear roundness runout of the wheel hub is large, resulting in large tool loss; 2. After the wheel hub is turned, due to the clamping angle deviation, the front and rear roundness fluctuations of the tool during turning are large, and the concentricity is not good, resulting in uneven contact between the tire and the ground when the wheel hub is subsequently put into use and assembled with the tire, causing shaking and vibration when the vehicle is driving, affecting the stability and comfort of driving and causing safety hazards. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] The technical problem to be solved by the utility model is that the existing CNC machine tools adopt three-jaw outer diameter clamping to fix the product during the clamping processing of the wheel hub, but there are the following problems: 1. When the wheel hub is clamped and then rotated for turning, the wheel hub and the clamping jaws are not parallel, that is, there is an angle deviation, which causes the wheel hub to tilt at a certain angle. During turning, the difference in the front and rear roundness of the wheel hub is large, resulting in large tool wear; 2. After the wheel hub is turned, due to the clamping angle deviation, the front and rear roundness of the tool fluctuates greatly during turning, and the concentricity is not good, resulting in uneven contact between the tire and the ground when the wheel hub is subsequently put into use and assembled with the tire, causing shaking and vibration of the vehicle during driving, affecting the driving stability and comfort, and causing safety hazards.

[0006] (II) Technical solution

[0007] In order to solve the above problems, the utility model provides the following technical solutions:

[0008] A high-stability center positioning device for wheel hub turning includes a hydraulic clamp, one side of the hydraulic clamp is provided with a support plate, the end of the hydraulic clamp is provided with a pulling claw, the support plate is provided with a main shaft, the main shaft is provided with a spring, one end of the spring is provided with a chuck baffle, and the chuck baffle is provided with a center chuck.

[0009] Furthermore, the support plate is connected to the center of the hydraulic clamp, and the support plate is vertically arranged to the main shaft.

[0010] Furthermore, the main shaft passes through the support plate and is fixedly connected to the support plate.

[0011] Furthermore, one end of the spring is fixedly connected to the support plate.

[0012] Furthermore, the chuck baffle is T-shaped, the chuck baffle is sleeved on the main shaft, and receiving parts are provided on both sides of the chuck baffle.

[0013] Furthermore, the central chuck is sleeved on the chuck baffle and connected to the receiving portion.

[0014] (III) Beneficial effects

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

[0016] 1. When turning the wheel hub, the stability is improved, so that the wheel hub is firmly fixed and does not generate vibration and vibration during the rotation cutting process, reducing the rotation fluctuation of the product during the processing process, so that the tool cutting will not increase the cutting path due to the hub jumping, thereby reducing tool loss;

[0017] 2. Improve product performance. Due to the change in processing method, the run-out value is fixed, the frequency of subsequent product adjustments is reduced, and production efficiency is improved.

[0018] 3. The change in production method not only simplifies the processing method, but also significantly improves product precision, which is conducive to process control. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model;

[0020] Figure 2 It is an enlarged view of local A;

[0021] Figure 3 It is a diagram of the use and matching state of the utility model;

[0022] Markings in the figure: 1-hydraulic clamping jaws, 2-supporting plate, 3-pulling claws, 4-spindle, 5-spring, 6-chuck baffle, 7-center chuck, 8-wheel hub, 9-tool, 6a-receiving part. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0025] See also Figure 1 -,3 shows a high-stability center positioning device for wheel hub turning, comprising a hydraulic clamp 1, a support plate 2 being provided on one side of the hydraulic clamp 1, a pulling claw 3 being provided at the end of the hydraulic clamp 1, a main shaft 4 being provided on the support plate 2, a spring 5 being provided on the main shaft 4, a chuck baffle 6 being provided at one end of the spring 5, and a center chuck 7 being provided on the chuck baffle 6.

[0026] See also Figure 1 The support plate 2 is connected to the center of the hydraulic clamp 1. The support plate 2 is perpendicular to the ground and the spindle 4, and the support plate 2 is always in a vertical state. When the wheel hub 8 is cut, it is fixed under the clamping of the claw 3, so that one side of the wheel hub 8 fits with the support plate 2. In the subsequent rotary cutting process, the wheel hub 8 is firmly fixed without offset. When the tool 9 is cutting, it is stable and efficient. When the traditional CNC machine tool is cutting, it is only clamped by the hydraulic clamp 1 that comes with the machine tool. The traditional hydraulic clamp 1 cannot do the claw 3. The wheel hub 8 has a highly stable clamping function and there is no support plate 2 for limiting. When a traditional CNC machine tool performs clamping, after the hydraulic clamp 1 clamps the outer surface of the wheel hub 8, a distance is maintained between the wheel hub 8 and the hydraulic clamp 1, and the clamping is uneven. That is, when the wheel hub 8 is clamped, there is a deviation in the outer circle, which causes the wheel hub 8 to tilt slightly. When the deviation occurs and cutting is performed, the cutting runout value of the wheel hub 8 is large, and the cutting path of the tool 9 is increased, which increases the loss and the outer circle and the inner circle after cutting are tilted, which can easily produce defective products and cause production waste.

[0027] The main shaft 4 passes through the support plate 2 and is fixedly connected to the support plate 2. The main shaft 4 and the support plate 2 are both fixedly connected to the CNC machine tool body through the hydraulic clamp 1, and provide supporting force for subsequent components.

[0028] See also Figure 3 One end of the spring 5 is fixedly connected to the support plate 2, one end of the spring 5 is fixedly connected to the support plate 2, and the other end is a free end and contacts with the chuck baffle 6. When the chuck baffle 6 is sleeved on the main shaft 4, it is limited by the spring 5, and then the center chuck 7 is sleeved on the chuck baffle 6, and then the wheel hub 8 is sleeved on the main shaft 4. At this time, the bramble inside the wheel hub 8 contacts the center chuck 7, and the center chuck 7 limits and fixes the wheel hub 8 and plays a partial supporting role. Then the oil pressure clamping jaw 1 links the pulling claw 3 to clamp the wheel hub 8. The clamping surface of the pulling claw 3 is an arc shape, which can better contact and clamp with the wheel hub 8, has high stability, and the pulling claw 3 is in the clamping process. The wheel hub 8 is pulled tight toward the support plate 2, and in the process of the wheel hub 8 approaching the support plate 2, tension is formed by the contraction of the spring 5, thereby improving the stability during processing. After that, the wheel hub 8 is pressed against the support plate 2 and cannot move and is fixed. At this time, cutting work is carried out. The runout value during the cutting process is low and stable throughout the whole process. After cutting, the hydraulic clamp 1 and the pull claw 3 are released. In the reset state of the spring 5, the spring 5 drives the chuck baffle 6 and the center chuck 7 to move slowly toward one end of the tool 9, thereby driving the wheel hub 8 to move in the opposite direction away from the support plate 2, and as a damping element, absorbs the force generated by the reset of the spring 5 and converts it into mechanical movement. After the wheel hub 8 moves, it is convenient for the staff to pick it up.

[0029] See also Figure 2 The chuck baffle 6 is T-shaped, the chuck baffle 6 is sleeved on the main shaft 4, and receiving parts 6a are provided on both sides of the chuck baffle 6. The chuck baffle 6 is sleeved on the main shaft 4 and is limited by the spring 5. At the same time, the center chuck 7 is received by the receiving part 6a.

[0030] The center chuck 7 is sleeved on the chuck baffle 6 and connected to the receiving part 6a. The function of the center chuck 7 is to fix the hub 8. A thorn is provided inside the hub 8. When the hub 8 is sleeved on the main shaft 4, the thorn 3 contacts the center chuck 7 to form a limited fixation, so that the hub 8 will not get too close to the support plate 2.

[0031] The specific working principle is: when the product is ready for processing, adjust the pulling claw 3 to the corresponding diameter according to the product model. After adjustment, select the corresponding spring 5 length according to the product width. After confirmation, select the corresponding center chuck 7 and chuck baffle 6 according to the stop size of the product (i.e., the hub 8) and install them on the main shaft 4. Then place the hub 8 on the step of the center chuck 7, and tighten the pulling claw 3 through the hydraulic clamp 1. When pulling the hub 8, pull one side of the hub 8 to fit with the support plate 2. The spring 5 ensures the stability of the product during the processing through tension. At this time, start cutting. After cutting is completed, release the hydraulic clamp 1 and the pulling claw 3. Under the reset action of the spring 5, the hub 8 is driven to withdraw, and the hub 8 can be removed.

[0032] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0033] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A high stability center positioning device for wheel hub turning, characterized in that: The invention comprises a hydraulic clamp (1), wherein one side of the hydraulic clamp (1) is provided with a support plate (2), the end of the hydraulic clamp (1) is provided with a pulling claw (3), the support plate (2) is provided with a main shaft (4), the main shaft (4) is provided with a spring (5), one end of the spring (5) is provided with a chuck baffle (6), and the chuck baffle (6) is provided with a center chuck (7).

2. A high stability center positioning device for wheel hub turning according to claim 1, characterized in that: The support plate (2) is connected to the center of the hydraulic clamp (1), and the support plate (2) and the main shaft (4) are vertically arranged.

3. A high stability center positioning device for wheel hub turning according to claim 1, characterized in that: The main shaft (4) passes through the support plate (2) and is fixedly connected to the support plate (2).

4. A high stability center positioning device for wheel hub turning according to claim 1, characterized in that: One end of the spring (5) is fixedly connected to the support plate (2).

5. The high stability center positioning device for wheel hub turning according to claim 1, characterized in that: The chuck baffle (6) is T-shaped, the chuck baffle (6) is sleeved on the main shaft (4), and receiving portions (6a) are provided on both sides of the chuck baffle (6).

6. A high stability center positioning device for wheel hub turning according to claim 5, characterized in that: The central chuck (7) is sleeved on the chuck baffle (6) and connected to the receiving portion (6a).

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