Double floating positioning fixture for front axle forgings

Abstract

The present invention provides a double floating positioning fixture for front axle forgings, including a base and a centering device. Two floating clamping assemblies are provided on the base, and the two floating clamping assemblies clamp the workpiece at the same time. The floating clamping assembly includes a floating positioning mechanism and a floating clamping mechanism. The floating positioning mechanism is used to floatly support the corresponding workpiece, and the floating clamping mechanism is used to press the workpiece onto the corresponding floating positioning mechanism. The centering device includes two clamping mechanisms, and the two clamping mechanisms are used to adjust the axial position of the workpiece. The beneficial effect of adopting the present invention is that the floating positioning mechanism is used to contact the two leaf spring seats of the front axle, and then the centering device is used to adjust the position of the front axle, and the floating positioning mechanism can automatically adapt to the flatness of the corresponding leaf spring seat. Finally, the floating clamping mechanism and the corresponding floating positioning mechanism are used to clamp the front axle, so that the front axle is in the correct position in the axial and radial directions, ensuring the stability and reliability of the front axle clamping process.

Description

Technical Field

[0001] The invention relates to the technical field of front axle forging clamping, in particular to a double-floating positioning fixture used for front axle forgings. Background Art

[0002] Currently, to meet product technical and processing requirements, the traditional first step in forging the upper surface of the front axle leaf spring seat is milling the upper surface of the leaf spring seat. After the upper surface of the leaf spring seat is machined, the kingpin hole is subsequently positioned and machined using two planes or three fixed supports plus one floating support. Due to the good flatness of the upper surface of the leaf spring seat, this positioning method can meet the front axle processing requirements. However, the processing process requires at least one datum conversion, and its processing datum is inconsistent with the inspection datum, resulting in low processing efficiency and large fluctuations in processing quality.

[0003] With advancements in forging technology, the upper surface of the leaf spring seat can now meet the product's technical requirements for flatness of both a single plane and two planes (when considered as a single plane) through forging alone. This eliminates the need for machining the upper surface of the leaf spring seat. However, the kingpin hole still needs to be machined using the upper surface as a positioning reference. If the existing positioning method is used for the streamlined, near-net-shape front axle streamline structure, the larger flatness of the upper surface of the front axle leaf spring seat will lead to unstable positioning during front axle machining, resulting in significant movement of the kingpin hole during machining. Consequently, existing fixtures are unable to stably clamp the front axle with the relatively large flatness of the upper surface of the leaf spring seat. Summary of the Invention

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a double floating positioning fixture for front axle forgings, which is used to solve the technical problem that the existing fixtures in the prior art cannot process the front axle with a large surface flatness of the leaf spring seat.

[0005] To achieve the above-mentioned and other related purposes, the present invention provides a double floating positioning fixture for a front axle forging, comprising:

[0006] A base, wherein the base is provided with two floating clamping units for positioning and clamping the front axle forging, and the two floating clamping units are spaced apart along the length direction of the front axle forging;

[0007] Each of the floating clamping units includes a mounting seat, a first floating component, a positioning plate and a first clamping mechanism. A first mounting groove is provided on the upper surface of the mounting seat, and the bottom of the first mounting groove is spherical. The first floating component is arranged in the first mounting groove and cooperates with the spherical surface of the first mounting groove. The positioning plate is arranged on the first floating component. The positioning plate is located above the mounting seat. There is a first floating gap between the positioning plate and the upper surface of the mounting seat. The clamping mechanism is used to press the front axle forging onto the positioning plate.

[0008] Optionally, the positioning plate and the two leaf spring seats of the front axle are used for support, and finally the front axle forging is clamped by a clamping mechanism. Since the first floating component cooperates with the spherical surface of the first mounting groove, when the leaf spring seat of the front axle forging is placed on the corresponding positioning plate, the workpiece can be floated and adjusted along with the positioning plate, and the positioning plate can automatically adapt to the flatness of the leaf spring seat of the front axle during the clamping process, ensuring the stability and reliability of the front axle clamping process.

[0009] Optionally, the mounting seat is provided with a first limiting structure for limiting the vertical floating range of the positioning plate.

[0010] Optionally, the first limiting structure includes a plurality of baffles, which are mounted on the mounting seat through a bracket and block the top of the positioning plate. The positioning plate extends into the gap between the baffle and the upper surface of the mounting seat, and the baffles are respectively arranged on both sides of the corresponding leaf spring seat in the width direction.

[0011] Optionally, the first clamping mechanism includes a clamping seat, a second floating component and a clamping component, the lower end surface of the clamping seat is provided with a second mounting groove, and the bottom of the second mounting groove is a spherical surface, the second floating component extends into the second mounting groove and cooperates with the spherical surface of the second mounting groove, and the clamping component is connected to the lower end of the second floating component.

[0012] Optionally, a second limiting structure for limiting the floating range of the second floating component is provided on the pressing seat, there is a movable gap between the second limiting structure and the second floating component, and the second limiting structure limits the second floating component from detaching from the pressing seat.

[0013] Optionally, the second limiting structure includes a cover plate arranged relative to the periphery of the second mounting groove, a second floating gap is provided between the cover plate and the lower end surface of the clamping seat, a through hole is provided in the middle of the cover plate, and a connecting portion for connecting the clamping portion is provided at the lower end of the second floating component, the connecting portion extends downward from the through hole to the cover plate, and a third floating gap is provided between the connecting portion and the through hole.

[0014] Optionally, the centers of the first floating component and the second floating component are arranged vertically relative to each other to ensure that the front axle is subjected to balanced force during the clamping process.

[0015] Optionally, the double floating positioning fixture further includes a centering device, which includes two clamping mechanisms and a second driving device, and the second driving device is used to drive the two clamping mechanisms to adjust the position of the front axle.

[0016] Optionally, the pressing component includes a connecting plate and a plurality of pressure rods, all of the pressure rods are arranged on the end surface of the connecting plate facing away from the cover plate, and all of the pressure rods are respectively located on both sides of the corresponding leaf spring seat in the width direction.

[0017] Optionally, the floating clamping mechanism includes a first driving device, which is arranged on the base. The first driving device corresponds one-to-one to the clamping seat, and the clamping seat is installed at the corresponding movable end of the first driving device. The first driving device is used to drive the clamping seat close to or away from the positioning plate.

[0018] As described above, a double floating positioning fixture for a front axle forging according to the present invention has the following beneficial effects: a floating positioning mechanism is utilized to contact the two leaf spring seats of the front axle, a centering device is utilized to adjust the position of the front axle, and the floating positioning mechanism is enabled to automatically adapt to the flatness of the corresponding leaf spring seat, and finally, a floating clamping mechanism and a corresponding floating positioning mechanism are utilized to clamp the front axle, so that the front axle is in the correct position in the axial and radial directions, thereby ensuring a stable and reliable front axle clamping process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Shown is a schematic structural diagram of an embodiment of the present invention;

[0020] Figure 2 A schematic diagram showing the structure of a first perspective when clamping a workpiece in one embodiment of the present invention

[0021] Figure 3 Shown is a schematic structural diagram of a second perspective in a workpiece clamping state according to an embodiment of the present invention;

[0022] Figure 4 Shown is a cross-sectional schematic diagram of a floating clamping unit according to one embodiment of the present invention;

[0023] Figure 5 Shown is a structural schematic diagram of another form of the connecting plate 16 in one embodiment of the present invention;

[0024] Figure 6 Shown is a schematic diagram of the connection relationship between the second floating component 12 and the connecting plate 16 in one embodiment of the present invention;

[0025] Figure 7 It is a schematic structural diagram of the cover plate 14 in one embodiment of the present invention.

[0026] Part Number Description

[0027] 1 base

[0028] 4 Mounting Blocks

[0029] 5 positioning plate

[0030] 6First floating component

[0031] 7First limit device

[0032] 8First drive device

[0033] 9 Clamping mechanism

[0034] 11 Connecting seat

[0035] 12 second floating component

[0036] 14 cover

[0037] 15 connecting rod

[0038] 16 connecting plates

[0039] 17 pressure rod

[0040] 18 Second drive device

[0041] 19 tie rod DETAILED DESCRIPTION

[0042] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different viewpoints and applications without departing from the spirit of the present invention.

[0043] See also Figures 1 to 7It should be noted that the diagrams provided in this embodiment are only schematic illustrations of the basic concept of the present invention. Therefore, the diagrams only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. The type, quantity and proportion of each component in actual implementation can be changed at will, and the component layout type may also be more complex. The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read. They are not used to limit the limiting conditions for the implementation of the present invention and therefore have no technical significance. Any modification of the structure, change in the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the efficacy and purpose that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be considered as the scope of the implementation of the present invention without substantially changing the technical content.

[0044] like Figures 1 to 4 As shown, the present invention provides a double floating positioning fixture for a front axle forging, which is used to clamp the front axle, wherein the front axle includes two leaf spring seats, including:

[0045] A base, on which are provided two floating clamping units for positioning and clamping the front axle forging, the two floating clamping units being spaced apart along the length direction of the front axle forging;

[0046] Each floating clamping unit includes a mounting seat 4, a first floating component 6, a positioning plate 5 and a first clamping mechanism. A first mounting groove is provided on the upper surface of the mounting seat 4. The bottom of the first mounting groove is spherical. The first floating component 6 is arranged in the first mounting groove and cooperates with the spherical surface of the first mounting groove. The positioning plate 5 is arranged on the first floating component 6. The positioning plate 5 is located above the mounting seat 4. There is a first floating gap between the positioning plate 5 and the upper surface of the mounting seat 4. The clamping mechanism is used to press the front axle forging onto the positioning plate 5.

[0047] It should also be noted that the first floating component 6 is hemispherical or two-thirds spherical, and the first floating component 6 extends out of the first mounting slot. The positioning plate 5 and the protruding portion of the first floating component 6 are connected by bolts, and at the same time, a first floating gap for the rotation of the positioning plate 5 is formed between the positioning plate 5 and the mounting seat 4.

[0048] It is further explained that the positioning plate 5 is used to contact and support the front axle forging, and finally the clamping mechanism is used to clamp the front axle forging. Since the first floating component 6 is spherically matched with the first mounting groove, when the leaf spring seat of the front axle forging is placed on the corresponding positioning plate 5, the workpiece can be floated and adjusted with the positioning plate 5, and the positioning plate 5 can automatically adapt to the flatness of the leaf spring seat of the front axle during the clamping process, ensuring the stability and reliability of the front axle clamping process.

[0049] Exemplarily, the mounting seat 4 is provided with a first limiting structure 7 for limiting the vertical floating range of the positioning plate 5. The first limiting structure 7 is used to limit the floating range of the positioning plate 5. At the same time, a limiting gap is formed between the first limiting structure 7 and the positioning plate 5. The limiting gap is the floating range of the positioning plate 5. At the same time, the first limiting structure 7 limits the positioning plate 5 on both sides of the width direction of the front axle forging.

[0050] It is further explained that the first limiting structure 7 includes multiple baffles, which are installed on the mounting seat through brackets and block the top of the positioning plate 5. The positioning plate 5 extends into the gap between the baffle and the upper surface of the mounting seat. The baffles are respectively arranged on both sides of the corresponding leaf spring seat in the width direction.

[0051] It should also be noted that the first limiting structure 7 is two baffles arranged opposite to each other and located on opposite sides of the positioning plate 5. When the front axle forging is clamped, the two baffles are located on both sides of the width direction of the front axle forging. The baffles are long strips, and the length direction of the baffles is the same as the length direction of the front axle.

[0052] It is further explained that the baffles are arranged on both sides of the width direction of the front axle forging, and the two edges of the positioning plate 5 located on the width direction of the front axle forging extend into between the baffles and the mounting seat 4, forming a limiting gap between the baffles and the mounting seat 4.

[0053] Exemplarily, the first clamping mechanism includes a clamping seat 11, a second floating component 12 and a clamping component. The lower end surface of the clamping seat 11 is provided with a second mounting groove, and the bottom of the second mounting groove is a spherical surface. The second floating component 12 extends into the second mounting groove and cooperates with the spherical surface of the second mounting groove. The clamping component is connected to the lower end of the second floating component 12.

[0054] It should also be noted that the second floating component 12 extends out of the corresponding second mounting slot, and the extended portion of the second floating component 12 is bolted to the pressing component.

[0055] The pressing seat 11 is provided with a second limiting structure for limiting the floating range of the second floating component 12 . There is a movable gap between the second limiting structure and the second floating component, and the second limiting structure limits the second floating component 12 from separating from the pressing seat 11 .

[0056] like Figure 6As shown, it should also be noted that the floating range of the second floating part 12 is located within the movable gap, and the second limiting structure includes a cover plate 14 relatively arranged on the periphery of the second mounting groove, and a second floating gap is provided between the cover plate 14 and the lower end surface of the clamping seat. The second floating part 12 is adjusted within the second floating gap according to the unevenness of the clamping surface of the clamped workpiece to ensure that the rotation angle of the second floating part 12 is sufficient. A through hole is provided in the middle of the cover plate 14, and a connecting rod 15 for connecting the clamping part is provided at the lower end of the second floating part 12. The connecting rod 15 extends downward from the through hole of the cover plate 14, and a third floating gap is provided between the connecting rod 15 and the through hole. When the connecting rod 15 rotates with the second floating part 12, the third floating gap is the movable range of the connecting rod 15.

[0057] like Figure 7 As shown, it is further explained that the through hole opened in the middle of the cover plate 14 is a square hole, the axial cross-section of the connecting rod 15 is square, the angle of the connecting rod 15 can be adjusted in the through hole, and the connecting rod 15 will be restricted by the square through hole when rotating, which limits the rotation of the connecting rod 15, so that the pressure rod 17 will not rotate during the clamping process, ensuring that the clamping position of the pressure rod 17 is accurate.

[0058] Illustratively, the centers of the first floating component 6 and the second floating component 12 are arranged relative to each other in the upper and lower directions, so as to ensure that the front axle is subjected to balanced force during the clamping process, so that while the clamping component applies a clamping force to the front axle forging, the positioning plate 5 can effectively support the front axle forging, ensuring that in the clamping direction, the supporting force and the clamping force can be in the same direction.

[0059] Exemplarily, the double floating positioning fixture further includes a centering device, which includes two clamping mechanisms 9 and a second driving device 18. The second driving device 18 is used to drive the two clamping mechanisms 9 to adjust the position of the front axle.

[0060] In one embodiment, the clamping mechanism 9 includes a positioning groove for abutting against a corresponding front axle end.

[0061] It should also be noted that the positioning groove is a V-shaped groove, which is convenient for guiding the front axle end when it is close to the corresponding front axle end, so that when the positioning groove is close to the front axle end, the positioning groove can center the lateral position of the front axle end.

[0062] Exemplarily, the second drive device 18 is installed in the middle of the base 1. The second drive device 18 is a hydraulic press or a cylinder. The second drive device 18 is connected to the two clamping mechanisms 9 through a pull rod 19. The clamping mechanisms 9 are hinged on the base 1. The second drive device 18 drives the pull rod 19 to drive the two clamping mechanisms 9 to rotate. When the output end of the second drive device 18 is extended, the positioning groove of the clamping mechanism 9 is close to the corresponding front axle end, and the axial and lateral positions of the front axle are adjusted. When the output end of the second drive device 18 is retracted, the positioning groove of the clamping mechanism 9 is away from the corresponding front axle end.

[0063] Exemplarily, the clamping component includes a connecting plate 16 and multiple pressure rods 17. All pressure rods 17 are arranged on the end surface of the connecting plate 16 facing away from the cover plate 14. Since the cross-section of the leaf spring seat is I-shaped, the pressure rods 17 can be used to press the lower part of the leaf spring seat to improve the clamping effect.

[0064] It should also be noted that the pressure rods 17 are respectively located on both sides of the corresponding leaf spring seat in the width direction, further ensuring the clamping effect of the front axle.

[0065] Exemplarily, a first driving device 8 is provided on the mounting seat 4, and the first driving device 8 is used to drive the clamping seat 11 close to or away from the positioning plate 5. The first driving device 8 is a motor or a hydraulic press, which provides power for the movement of the clamping seat 11 and drives the clamping seat 11 close to or away from the corresponding positioning plate 5.

[0066] It should also be noted that when using a double floating positioning fixture to process the front axle, in order to ensure product quality, the front axle products should be tested using the same positioning method, and only qualified products can be processed.

[0067] like Figure 5 As shown, a three-claw connecting plate 16 is also provided in this embodiment. The connecting plate 16 is provided with three branches, and the branches are distributed divergently with the connecting rod as the center. Each branch is provided with at least one pressure rod 17 for pressing other forgings, and two adjacent pressure rods 17 are pressed on the corresponding forgings.

[0068] In summary, a floating positioning and clamping fixture of the present invention can utilize floating positioning to clamp the two leaf spring seats of the front axle, and then utilize a centering device to adjust the axial position and lateral position of the front axle to ensure that the front axle is in the correct position when it is placed on the positioning plate 5. Since the first floating component cooperates with the spherical surface of the first mounting groove, when the workpiece is placed on the positioning plate 5, the front axle can make the positioning plate 5 float with the front axle according to its own weight, adapt to the flatness of the upper surface of the front axle leaf spring seat, and then use multiple pressure rods 17 of the clamping component to clamp. During the clamping process, the pressure rod 17 can also be floated and adjusted according to the contact of the leaf spring seat to ensure stable contact and clamping between the front axle and the clamp, solving the problem that the existing clamp cannot stably and reliably clamp the front axle with a larger surface flatness of the leaf spring seat.

[0069] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. A double floating positioning fixture for a front axle forging, characterized in that: include: A base, wherein the base is provided with two floating clamping units for positioning and clamping the front axle forging, and the two floating clamping units are spaced apart along the length direction of the front axle forging; Each of the floating clamping units includes a mounting seat, a first floating component, a positioning plate, and a first pressing mechanism, wherein a first mounting groove is provided on an upper surface of the mounting seat, a bottom of the first mounting groove is spherical, the first floating component is arranged in the first mounting groove and cooperates with the spherical surface of the first mounting groove, the positioning plate is arranged on the first floating component, the positioning plate is located above the mounting seat, and a first floating gap is formed between the positioning plate and the upper surface of the mounting seat, and the pressing mechanism is used to press the front axle forging onto the positioning plate; The mounting seat is provided with a first limiting structure for limiting the vertical floating range of the positioning plate, the first limiting structure comprising a plurality of baffles, the baffles being mounted on the mounting seat through brackets and blocking the upper portion of the positioning plate, the positioning plate extending into the gap between the baffles and the upper surface of the mounting seat, the baffles being respectively arranged on both sides in the width direction of the corresponding leaf spring seat; The first pressing mechanism includes a pressing seat, a second floating component and a pressing component, the lower end surface of the pressing seat is provided with a second mounting groove, and the bottom of the second mounting groove is a spherical surface, the second floating component extends into the second mounting groove and cooperates with the spherical surface of the second mounting groove, the pressing component is connected to the lower end of the second floating component, and the pressing seat is provided with a second limiting structure for limiting the floating range of the second floating component, there is a movable gap between the second limiting structure and the second floating component, and the second limiting structure limits the second floating component from separating from the pressing seat; The centers of the first floating component and the second floating component are arranged opposite to each other up and down, so as to ensure that the front axle is subjected to balanced force during the clamping process.

2. The double floating positioning fixture for front axle forging according to claim 1, characterized in that: The second limiting structure includes a cover plate arranged relatively to the periphery of the second mounting groove, a second floating gap is provided between the cover plate and the lower end surface of the clamping seat, a through hole is provided in the middle of the cover plate, and a connecting portion for connecting the clamping portion is provided at the lower end of the second floating component, the connecting portion extends downward from the through hole to the cover plate, and a third floating gap is provided between the connecting portion and the through hole.

3. The double floating positioning fixture for front axle forging according to claim 1, characterized in that: The double floating positioning fixture further comprises a centering device, which comprises two clamping mechanisms and a second driving device, wherein the second driving device is used to drive the two clamping mechanisms to adjust the position of the front axle.

4. The double floating positioning fixture for front axle forging according to claim 3, characterized in that: The pressing component comprises a connecting plate and a plurality of pressure rods, all of which are arranged on the end surface of the connecting plate facing away from the cover plate, and all of which are respectively located on both sides of the corresponding leaf spring seat in the width direction.

5. The double floating positioning fixture for front axle forging according to claim 4, characterized in that: The floating clamping mechanism includes a first driving device, which is arranged on the base. The first driving device corresponds to the clamping seat one by one. The clamping seat is installed at the corresponding movable end of the first driving device. The first driving device is used to drive the clamping seat close to or away from the positioning plate.

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