Cross tie arm milling fixture

Abstract

This utility model relates to the field of automotive parts manufacturing technology, and in particular to a milling fixture for a tie rod arm, comprising a base, a first support, a second support, and a clamping device. The first support has a first notch groove with a first through hole at the bottom. The second support has a second notch groove with a second through hole at the bottom. After the tie rod arm is fixed above the first and second supports, the first connecting seat of the tie rod arm is located in the first notch groove, and the second connecting seat is located in the second notch groove. By aligning the first and second connecting seats of the tie rod arm with the notches of the first and second supports respectively, and fixing the tie rod arm by the clamping device, it is convenient to process the end face and connecting hole of the tie rod arm connecting seat, thereby realizing the processing of one end face and drilling operation of the workpiece in one clamping, improving the uniformity of the processing datum, reducing the number of clamping operations, and improving positioning accuracy.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts manufacturing technology, and in particular to a milling fixture for a tie rod arm. Background Technology

[0002] As a core component of the front axle of an automobile, the tie rod arm plays a crucial role in the vehicle's steering system. It not only needs to ensure synchronized steering of both wheels but also requires precise toe-in adjustment. A typical tie rod arm structure, such as the left tie rod arm disclosed in CN213862402U, includes two connecting seats (a first connecting seat and a second connecting seat) and a connecting arm connecting the two. The connecting seats have connecting holes for assembly. During manufacturing, the tie rod arm requires two key processes: milling the end faces of the connecting seats and machining the connecting holes.

[0003] The current processing methods in the industry have significant drawbacks: First, milling and drilling processes require two separate fixture systems, which not only increases equipment costs and space requirements, but more importantly, the inconsistent reference surfaces for the two clamping operations make it difficult to unify the processing datum. Second, traditional fixtures lack sufficient positioning accuracy for the connecting seat, easily causing positional deviations during milling and affecting the accuracy of subsequent drilling processes. Third, existing fixtures lack effective adjustment mechanisms, making it difficult to adapt to the processing requirements of different specifications of tie rod arms, resulting in low processing efficiency. These problems ultimately affect the quality of the finished product, causing issues such as substandard connecting hole position accuracy and end face parallelism deviations, seriously impacting the assembly accuracy and performance of automotive steering systems. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a milling fixture for tie rod arms, which solves problems such as inaccurate positioning and uneven clamping force in traditional fixtures, thereby improving the machining accuracy and efficiency of tie rod arms.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a milling fixture for a horizontal tie rod arm, including a base, a first support and a second support are provided on the top of the base, a clamping device is provided between the first support and the second support, the first support is provided with a plurality of first notches, and a first through hole is provided at the bottom of the first notch, the second support is provided with a second notch, and a second through hole is provided at the bottom of the second notch, the first notch and the second notch are correspondingly arranged, after the horizontal tie rod arm is fixed above the first support and the second support, the first connecting seat of the horizontal tie rod arm is located in the first notch, and the second connecting seat is located in the second notch.

[0006] Furthermore, the clamping device includes a pressure plate, a screw, and a locking nut. The screw passes through the pressure plate and is threadedly connected to the locking nut. After the horizontal tie rod arm is fixed above the first support and the second support, the screw is perpendicular to the connecting arm of the horizontal tie rod arm.

[0007] Furthermore, the depth of the first notch is less than the height of the first connector, and the depth of the first notch is 1 / 3 to 2 / 3 of the height of the first connector.

[0008] Furthermore, the depth of the second notch is less than the height of the second connector, and the depth of the second notch is 1 / 3 to 2 / 3 of the height of the second connector.

[0009] Furthermore, the cross-section of the first notch is V-shaped to enable rapid positioning of the tie rod arm.

[0010] Furthermore, a clamping screw is provided inside the second notch, and the clamping screw is threadedly connected to the second support.

[0011] Furthermore, the height of the first support or the second support is adjustable.

[0012] Furthermore, the second support or the first support is slidably connected to the base, and the second support or the first support is provided with a locking device for locking the second support or the first support to the base, thereby facilitating the adjustment of the distance between the first support and the second support.

[0013] The beneficial effects of this invention are as follows: After the tie rod arm is fixed above the first and second supports, the sidewalls of the notch grooves of the first and second supports can limit the lateral displacement of the connecting seat. The bottom plane provides a vertical support reference, and the through hole at the bottom of the notch groove can provide a channel for chip removal during the machining process and facilitate tool retraction. The clamping device acts on the connecting arm area between the two connecting seats, applying even pressure to make the workpiece fit tightly against the support surface. When machining the end face, the milling cutter mills the top surface of the connecting seat protruding from the notch groove; when machining the connecting hole, the drill bit drills the bottom of the connecting seat. Since both end face machining and hole machining use the bottom surface of the notch groove as a unified reference surface, the accumulation of errors caused by reference conversion is avoided. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 yes Figure 1 The main view.

[0016] Figure 3 yes Figure 1 Top view.

[0017] Figure 4 yes Figure 1 Side view.

[0018] Explanation of reference numerals in the attached figures:

[0019] 1—Base, 2—First support, 21—First notch, 22—First through hole, 3—Second support, 31—Second notch, 32—Second through hole, 4—Pressure device, 41—Pressure plate, 42—Screw, 43—Locking nut, 5—Clamping screw, 6—Locking device. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the scope of the present invention.

[0021] It should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] like Figures 1-4As shown, a milling fixture for a horizontal tie rod arm in this embodiment includes a base 1. A first support 2 and a second support 3 are provided on the top of the base 1. A clamping device 4 is provided between the first support 2 and the second support 3. The first support 2 is provided with a plurality of first notches 21. A first through hole 22 is provided at the bottom of the first notch 21. The second support 3 is provided with a second notch 31. A second through hole 32 is provided at the bottom of the second notch 31. The first through hole 22 and the second through hole 32 are channels that penetrate the bottom of the support and are used for retracting the machining tool and discharging chips. The first notch 21 and the second notch 31 are provided correspondingly. After the horizontal tie rod arm is fixed above the first support 2 and the second support 3, the first connecting seat of the horizontal tie rod arm is located in the first notch 21 and the second connecting seat is located in the second notch 31.

[0024] After the tie rod arm is placed above the first support 2 and the second support 3, the first connecting seat and the second connecting seat at both ends of the tie rod arm are respectively placed in the first notch 21 of the first support 2 and the second notch 31 of the second support 3. The sidewalls of the notch can restrict the lateral displacement of the connecting seat, and the bottom plane of the notch provides a vertical support reference. The clamping device 4 acts on the connecting arm area between the two connecting seats of the tie rod arm, and applies even pressure to make the two ends of the workpiece adhere tightly to the surfaces of the first support 2 and the second support 3. When machining the end face, the milling cutter mills the end face of the two connecting seats protruding from the notch; when machining the connecting hole, the milling drill bit machines the connecting hole of the connecting seat, and the through hole is used for tool retraction and chip removal.

[0025] The clamping device 4 includes a pressure plate 41, a screw 42, and a locking nut 43. The screw 42 passes through the pressure plate 41 and is threadedly connected to the locking nut 43. After the horizontal tie rod arm is fixed above the first support 2 and the second support 3, the screw 42 is perpendicular to the connecting seat of the horizontal tie rod arm. The screw 42 passes vertically through the pressure plate 41 and engages with the locking nut 43 to form an adjustable clamping mechanism. When the horizontal tie rod arm is placed in the notch groove of the support, the pressure plate 41 covers the surface of the connecting arm of the horizontal tie rod arm. By tightening the locking nut 43, the screw 42 is subjected to a load in the vertical direction. Because the axis of the screw 42 is inclined, the direction of the clamping force and the lateral limit of the notch groove of the support form a spatial constraint, suppressing the displacement of the workpiece during milling or drilling. This ensures the clamping stability of the horizontal tie rod arm during milling and is beneficial to improving the consistency of the workpiece's machining accuracy.

[0026] The depth of the first notch 21 is less than the height of the first connecting seat, and the depth of the first notch 21 is 1 / 3 to 2 / 3 of the height of the first connecting seat. This ensures that after the first connecting seat is placed in the first notch 21, the lower part of the first connecting seat is constrained by the sidewall of the notch, while the upper exposed part remains free. When the tie rod arm is fixed to the fixture, the end face of the first connecting seat protrudes beyond the second notch 31, and the milling tool can directly machine the end face.

[0027] The depth of the second notch 31 is less than the height of the second connecting seat, and the depth of the second notch 31 is 1 / 3 to 2 / 3 of the height of the second connecting seat. This ensures that after the second connecting seat is placed in the second notch 31, the lower part of the second connecting seat is constrained by the side wall of the notch, while the upper exposed part remains free. When the tie rod arm is fixed to the fixture, the end face of the second connecting seat protrudes beyond the second notch 31, and the milling tool can directly machine the end face.

[0028] The first notch 21 has a V-shaped cross-section to enable rapid positioning of the tie rod arm. By designing the first notch 21 with a V-shaped cross-section, the self-centering characteristic unique to the V-shaped structure allows the first connecting seat of the tie rod arm to automatically slide into the center position of the groove bottom during placement. This bidirectional guiding effect generated by the geometric structure allows for automatic alignment of the workpiece axis with the fixture reference without repeated manual adjustments, effectively shortening the position calibration time during clamping. At the same time, the two-point support structure formed by the V-shaped contact surface provides a stable clamping foundation for the clamping device 4, thereby improving the overall workpiece positioning repeatability and process reliability during milling.

[0029] A clamping screw 5 is provided inside the second notch 31, and the clamping screw 5 is threadedly connected to the second support 3. By providing a clamping screw 5 threadedly connected to the support inside the second notch 31, the clamping screw 5 can provide a horizontal force to the second connecting seat, thereby fixing the workpiece under the synergistic effect of the first notch 21 and ensuring the clamping stability of the workpiece by the fixture during the processing.

[0030] The height of the first support 2 or the second support 3 is adjustable. By designing the first support 2 or the second support 3 as a height-adjustable structure, the fixture can be adapted to milling operations of different workpiece sizes.

[0031] The second support 3 or the first support 2 is slidably connected to the base 1. The second support 3 or the first support 2 is equipped with a locking device 6, which is used to lock the second support 3 or the first support 2 to the base 1, thereby facilitating the adjustment of the distance between the first support 2 and the second support 3. The sliding connection structure allows the support and the base 1 to form a movable mechanical fit, enabling the first support 2 and the second support 3 to freely move according to the actual dimensions of the tie rod arm. After adjustment, the locking device 6 rigidly fixes the sliding component to the base 1, preventing displacement deviation during processing and achieving adaptability of the fixture to different workpiece sizes. The locking device 6 can be a locking screw or a pin, which engages with the through holes on the first support 2, the second support 3, and the base 1 to achieve horizontal fixation of the first support 2 and the second support 3.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A tie rod arm milling jig, characterized by: Includes a base (1), above which a first support (2) and a second support (3) are provided, and a clamping device (4) is provided between the first support (2) and the second support (3). The first support (2) is provided with a plurality of first notches (21), and a first through hole (22) is provided at the bottom of the first notch (21). The second support (3) is provided with a second notch (31), and a second through hole (32) is provided at the bottom of the second notch (31). The first notch (21) and the second notch (31) are provided correspondingly. After the horizontal tie arm is fixed above the first support (2) and the second support (3), the first connecting seat of the horizontal tie arm is located in the first notch (21), and the second connecting seat is located in the second notch (31).

2. A cross rod arm milling fixture according to claim 1, wherein: The clamping device (4) includes a pressure plate (41), a screw (42) and a locking nut (43). The screw (42) passes through the pressure plate (41) and is threadedly connected to the locking nut (43). After the horizontal tie rod arm is fixed above the first support (2) and the second support (3), the screw (42) is perpendicular to the connecting arm of the horizontal tie rod arm.

3. A milling fixture for a tie rod arm according to claim 1, characterized in that: The depth of the first notch (21) is less than the height of the first connector, and the depth of the first notch (21) is 1 / 3 to 2 / 3 of the height of the first connector.

4. A cross rod arm milling fixture according to claim 1, wherein: The depth of the second notch (31) is less than the height of the second connector, and the depth of the second notch (31) is 1 / 3 to 2 / 3 of the height of the second connector.

5. A tie rod arm milling fixture according to claim 1, wherein: The cross-section of the first notch (21) is V-shaped.

6. A tie rod arm milling fixture according to claim 1, wherein: The second notch (31) is provided with a clamping screw (5), which is threadedly connected to the second support (3).

7. A tie rod arm milling fixture according to claim 1, wherein: The height of the first support (2) or the second support (3) is adjustable.

8. A tie rod arm milling fixture according to claim 1, wherein: The second support (3) or the first support (2) is slidably connected to the base (1), and the second support (3) or the first support (2) is provided with a locking device (6).

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