Frame type horizontal machining clamp for air inlet aluminum bent pipe

Abstract

The utility model relates to a frame type horizontal machining clamp for an air inlet aluminum elbow. The frame type horizontal machining clamp comprises a bottom plate, a left stand column and a right stand column are arranged at the two ends of the bottom plate respectively. A centering clamping mechanism is arranged between the left stand column and the right stand column. A movable centering mechanism is arranged on the front sides of the left stand column and the right stand column; clamping mechanisms are arranged on the outer sides of the left stand column and the right stand column. All machining can be completed through one-time clamping, the machining precision of aluminum bent pipe products is high, and the machining process is stable and reliable.

Description

Technical Field

[0001] This utility model relates to the field of machining fixture technology, and in particular to a frame-type horizontal machining fixture for an air intake aluminum bend. Background Technology

[0002] Aluminum bends are a type of thin-walled product, such as... Figure 6-7 As shown, its machined surfaces and holes are concentrated at the large and small ends. Due to its irregular shape, positioning and clamping are difficult. In the past, multi-process machining was generally used, first machining one end with a lathe or vertical machining center, and then machining the other end multiple times with a drilling machine or vertical machining center. Although the multi-process process can barely complete the machining, the positional accuracy between the machined surfaces and holes is relatively low. In addition, aluminum material itself is prone to deformation. Due to the thin-walled characteristics of aluminum bent tubes, existing machining fixtures aggravate clamping deformation, ultimately resulting in low machining accuracy, low yield, and poor clamping effect of aluminum bent tube products. Moreover, existing machining fixtures require the use of different machining fixtures or disassembling the product before changing the direction for clamping and positioning when machining different parts of the aluminum bent tube, resulting in low work efficiency. Utility Model Content

[0003] This invention primarily addresses the technical problems of existing fixtures, such as low clamping accuracy and easy deformation. It proposes a frame-type horizontal machining fixture for aluminum bends with air intakes. The aluminum bend is placed vertically within the fixture, with the central axis of the small end horizontal and the large end inclined. The central axes of the holes on both sides of the large end are also horizontal. Through the rotation function of the horizontal machining center's worktable, all machining surfaces and holes of the aluminum bend can be completed in a single clamping operation. Because aluminum bends are very prone to clamping deformation, manual tightening is currently used. However, this can easily lead to insufficient clamping force and loosening. Therefore, manual tightening clamps are installed on both sides of the small end, the large end, and the middle of the aluminum bend. This clamping method is effective and ensures that the aluminum bend will not loosen or shift during processing. In addition, a manual centering mechanism is installed at the large end, and a movable manual centering mechanism is installed at the small end. After centering, the clamping mechanisms are pre-tightened first, the movable manual centering mechanism is removed, and the clamping mechanisms on both sides of the small end are tightened first, followed by the other clamping mechanisms. After that, aluminum tube bending can be processed. This fixture solution can be applied to most horizontal machining centers, can be widely used, and can fundamentally solve the problems mentioned above.

[0004] This utility model provides a frame-type horizontal clamping fixture for an air intake aluminum bend, including: a base plate;

[0005] A left column and a right column are respectively provided at both ends of the base plate; a centering and clamping mechanism is provided between the left column and the right column; a movable centering mechanism is provided on the front side of the left column and the right column; and a clamping mechanism is provided on the outer side of both the left column and the right column.

[0006] The centering and clamping mechanism includes: a positioning plate, a first centering sleeve, a large spindle, and a first top pin; the positioning plate is fixed between the left column and the right column; the first centering sleeve passes through the middle of the positioning plate; the first top pin is circumferentially movably passed through the outer wall of the first centering sleeve; a large end cap is provided at the upper end of the first centering sleeve; the large spindle is threaded inside the first centering sleeve.

[0007] The movable centering mechanism includes: a movable positioning plate, a guide rod, a guide sleeve, a second centering sleeve, a small mandrel, and a second top pin; guide sleeves are embedded in the front sides of both the left and right columns; guide rods are respectively provided at both ends of the rear side of the movable positioning plate; the guide rods can move within the guide sleeves; a second centering sleeve passes through the middle of the movable positioning plate; a small end cap is provided at the end of the second centering sleeve near the guide sleeve; a second top pin is circumferentially movably inserted through the outer wall of the second centering sleeve; the small mandrel is threaded within the second centering sleeve;

[0008] The clamping mechanism includes: a push-pull rod and an arc-shaped clamping block; the push-pull rod is threaded on both the left and right columns; and an arc-shaped clamping block is provided at one end of the push-pull rod located between the left and right columns.

[0009] Furthermore, the large spindle is threaded inside the first centering sleeve; the upper end of the large spindle is provided with a tapered surface; the inner end of the first top pin is provided with a tapered surface; the tapered surface of the large spindle can cooperate with the tapered surface of the first top pin.

[0010] Furthermore, the outer end face of the first top pin and the circumferential surface of the first centering sleeve are respectively provided with a first groove and a second groove; the first groove can communicate with the second groove; a first O-ring is provided in the first groove and the second groove.

[0011] Furthermore, limiting posts are respectively provided at both ends of the movable positioning plate and on the side of the guide rod.

[0012] Furthermore, a locking nut is fitted onto the push-pull rod.

[0013] Furthermore, a rear clamping mechanism is provided on the rear side of the left and right columns;

[0014] The rear clamping mechanism includes: a support, a second tightening bolt, a wing nut, a hinge shaft, a support plate, and a hinge seat;

[0015] The hinge seat is located on the rear side of the right column; one end of the hinge shaft is connected to the hinge seat via a pin; the support is located on the rear side of the left column; one end of the support plate is hinged to the support; the other end of the support plate is provided with a U-shaped opening; the other end of the hinge shaft can extend into the U-shaped opening; a second tightening bolt is provided in the middle of the support plate.

[0016] The wing nut engages with the end of the hinge shaft for locking.

[0017] Furthermore, positioning screws are respectively provided on the upper end of the positioning plate and on both sides of the first centering sleeve; a U-shaped pressure plate is movably provided on the upper end of the positioning plate.

[0018] Furthermore, the angle between the positioning plate and the horizontal position is in the range of 35-55°.

[0019] Furthermore, a handle is provided on the front side of the movable positioning plate.

[0020] Furthermore, both the left and right columns have notches at their rear ends.

[0021] The technical solution of this utility model is implemented as follows: In the fixture, the base plate and the frame are the main body of the fixture, and other parts are set on the frame. The frame is connected and fixed to the base plate by cylindrical pins and internal hexagon screws, which is very firm and has good stability.

[0022] The frame mainly consists of a left column, a right column, connecting rods, circular adjusting pads, positioning plates, and strip adjusting pads. Right-angle notches are provided in the middle and rear parts of both the left and right columns to facilitate the machining of the two side holes at the larger ends. The connecting rods are connected and fixed to the upper and middle parts of the left and right columns respectively using hexagonal socket screws. The positioning plates are connected and fixed to the lower parts of the left and right columns using cylindrical pins and hexagonal socket screws. Circular adjusting pads are provided on both sides of the connecting rods, and strip adjusting pads are provided on both sides of the positioning plates. The positioning plates are installed at a 45° angle to the horizontal. When installing the connecting rods and positioning plates, they should be fitted between the left and right columns with a small gap. If the connecting rods and positioning plates cannot be fitted in, the thickness of the circular and strip adjusting pads is reduced by turning or grinding to achieve a small assembly gap. This small gap assembly prevents deformation of the overall frame or excessive internal stress after clamping the connecting rods and positioning plates. The centering and clamping mechanism includes a first centering sleeve, a large end cap, a large mandrel, a first top pin, an O-ring, a positioning screw, a lock nut, a U-shaped pressure plate, a pressure plate pad, and a first tightening bolt. The first centering sleeve is installed on the positioning plate of the frame and mainly performs automatic centering and clamping of the large end of the intake aluminum bend. The large end cap is located at the end of the first centering sleeve, with a chamfered front end and made of copper. It serves as a guide and protector when the intake aluminum bend is inserted into the first centering sleeve. The large mandrel is threaded inside the first centering sleeve, and its front end has a tapered surface. Three first top pins are evenly distributed in the guide holes of the first centering sleeve, allowing for free sliding with a small gap and perpendicular to the axis of the large mandrel. The inner end of the first top pin also has a tapered surface, which mates with the tapered surface at the front end of the large mandrel. The outer end of the first top pin, away from the first centering sleeve, has an arc surface, which, after extending, contacts and positions the inner hole surface of the large end of the aluminum bend. The outer end face of the first top pin is also provided with a first groove, and the outer periphery of the first centering sleeve is also provided with a second groove. Then, the first groove of the first top pin and the second groove of the outer periphery of the first centering sleeve overlap by a part, and the two form a complete groove. The first O-ring is provided in this groove.

[0023] When the large mandrel is screwed inward, under the action of the conical surface engagement, the three first pins will simultaneously move outward within the guide hole of the first centering sleeve. One or two of the first pins will first contact the inner surface of the large end of the aluminum bend. Because the inner hole of the large end is not concentric with the three first pins at this time, as the first pins continue to move outward, they will push the aluminum bend forward until the arc surfaces of the outer ends of the three first pins contact and position themselves with the inner surface of the large end of the aluminum bend. The first O-ring is tightened by the three pins, thus completing the automatic centering of the large end of the aluminum bend. When the large mandrel is screwed outward, the conical surface of the large mandrel will separate from the conical surfaces of the three first pins. Under the action of the elastic force of the first O-ring, the three first pins are pressed into the guide hole of the first centering sleeve, and the aluminum bend can be easily removed.

[0024] When inserting the aluminum bend, ensure that the large end face of the bend contacts and is positioned with the two positioning screws. After the small end of the bend is also positioned, move the U-shaped pressure plate diagonally upwards to press against the outside of the bend until the large end face is above the two positioning screws. Tighten the screws to clamp the large end of the bend. The initial state of the U-shaped pressure plate is to be placed freely downwards, facilitating the insertion of the aluminum bend. The movable centering mechanism includes a movable positioning plate, guide rod, guide sleeve, limiting post, second centering sleeve, small end cap, small mandrel, second top pin, second O-ring, handle, etc., mainly for automatic centering of the small end of the intake aluminum bend. The two guide sleeves are respectively installed on the left and right columns. The guide rod enters the guide sleeve until the two limiting posts contact and limit the front surfaces of the left and right columns respectively. The small end cap also has a chamfered front end and is made of copper. As the guide rod enters the guide sleeve, the small end cap and the second centering sleeve also enter the inner hole of the small end of the aluminum bend. The small end cap serves as a guide and protector. The small mandrel is threaded inside the second centering sleeve, and its front end has a tapered surface. Three second top pins are evenly distributed in the guide hole of the second centering sleeve, allowing for free sliding with a small gap and perpendicular to the axis of the small mandrel. The inner end of the second top pin also has a tapered surface, which mates with the tapered surface at the front end of the small mandrel. The outer end of the second top pin has an arc surface, which, after expanding, contacts and positions with the inner hole surface of the small end of the aluminum bend. The outer end of the second top pin also has a third groove, which partially overlaps with the fourth groove at the inner end of the second centering sleeve, forming a complete groove. A second O-ring is installed in this groove.

[0025] When the small mandrel is screwed inward, under the action of the conical surface, the three second pins will move outward simultaneously in the guide hole of the second centering sleeve. One or two of the second pins will first contact the inner hole surface of the small end of the aluminum bend. Because the inner hole of the small end is not concentric with the three second pins at this time, as the second pins continue to move outward, they will push the aluminum bend to move slightly. Because the large end of the aluminum bend is only pre-clamped at this time, and the centering of the large end is all point contact, the aluminum bend can move slightly until the arc surface of the outer end of the three second pins contacts and positions the inner hole surface of the small end of the aluminum bend. The second O-ring is tightened by the three second pins, and the automatic centering of the small end of the aluminum bend is completed.

[0026] When the small mandrel is unscrewed outward, the conical surface of the small mandrel will separate from the conical surfaces of the three second pins. Under the action of the elastic force of the second O-ring, the three pins are pressed into the guide hole of the second centering sleeve, and the movable three-point centering mechanism can be easily removed from the aluminum bend.

[0027] Both the left and right columns are equipped with clamping mechanisms, which include arc-shaped clamping blocks, guide rods, push-pull rods, and locking nuts. The push-pull rod of the left clamping mechanism is threaded onto the left column, and the guide rod of the left clamping mechanism is located inside the left column. The guide rod is threaded into the arc-shaped clamping block, and the two are threadedly engaged. The guide rod of the left clamping mechanism has a small clearance fit with the guide hole of the left column. The push-pull rod of the right clamping mechanism is threaded onto the right column, and the guide rod of the right clamping mechanism is located inside the right column. The guide rod is threaded into the arc-shaped clamping block, and the two are threadedly engaged. The guide rod of the right clamping mechanism has a small clearance fit with the guide hole of the right column. The arc surface of the arc-shaped clamping block contacts and clamps the outer blank surface of the small end of the aluminum bent tube. A T-slot is provided on the opposite side of the arc surface. The T-head of the push-pull rod is clearance-fitted into the T-slot. Screwing the push-pull rod inward will push against the arc-shaped clamping block to clamp the aluminum bent tube and tighten the locking nut. Loosen the locking nut and pull the push-pull rod outwards, which will pull the arc-shaped clamping blocks to release the aluminum bend. Initially, both arc-shaped clamping blocks are positioned outwards, making it easy to load the aluminum bend product.

[0028] The rear clamping mechanism includes a support, a support plate, a second tightening bolt, a hinge seat, a hinge shaft, a wing nut, and a flat washer. It clamps the middle section of the aluminum bend. Opening the support plate allows the space between the left and right columns to be open, facilitating the loading and unloading of the aluminum bend. The support is mounted on the left column, and the hinge seat is mounted on the right column. The hinge shaft's bore end is connected to the hinge seat via a pin. One end of the support plate's bore end is connected to the support via a pin, and the other end of the support plate is a locking end with a U-shaped opening. The locking end of the hinge shaft can be rotated into the U-shaped opening, locking the hinge shaft end against the outer surface of the support plate. The wing nut then locks the support plate and hinge seat in place. The second tightening bolt clamps the middle section of the aluminum bend.

[0029] Compared with the prior art, the frame-type horizontal clamping fixture for the intake aluminum bend provided by this utility model has the following advantages:

[0030] 1. This utility model fixture is not only suitable for processing most aluminum bent tubes, but also for processing other irregularly shaped and difficult-to-position thin-walled aluminum parts.

[0031] 2. This utility model fixture has right-angle notches in the middle and rear parts of the left and right columns to avoid obstruction, which facilitates the processing of the two side holes at the large end; at the same time, the setting of the centering mechanism and the movable centering mechanism can realize the processing of different parts of the aluminum bend tube while clamping. Using this fixture, all processing can be completed in one clamping, which is simple to operate and has high work efficiency.

[0032] 3. The fixture of this utility model, through the setting of centering mechanism, movable centering mechanism, clamping mechanism and rear clamping mechanism, uses manual tightening in multiple places to avoid clamping deformation, making the clamping of aluminum bent tube more stable and less prone to deformation, thereby improving processing accuracy and yield. Attached Figure Description

[0033] Figure 1 This is a structural schematic diagram of the aluminum bend product installed by the clamp of this utility model.

[0034] Figure 2 This is a front view of the aluminum bend product without the fixture of this utility model installed.

[0035] Figure 3 This is a rear view of the aluminum bend product without the fixture of this utility model installed.

[0036] Figure 4 This is a structural schematic diagram of the aluminum bend product in its initial state before the fixture of this utility model is installed.

[0037] Figure 5 This is a schematic diagram of the structure of the movable three-point centering mechanism used in the fixture of this utility model.

[0038] Figure 6 This is the front view of the aluminum bent pipe product of this utility model.

[0039] Figure 7 This is a rear view of the aluminum bent tube product of this utility model.

[0040] Reference numerals: 1. Workbench; 2. Base plate; 3. Base plate positioning plate; 4. T-block; 5. Mounting hole; 6. Butterfly nut; 7. Hinge shaft; 8. Support plate; 9. U-shaped opening; 10. Left column; 11. Right column; 12. First centering sleeve; 13. Arc-shaped clamping block; 14. Large spindle; 15. First top pin; 16. Large end inner hole surface; 17. Handle; 18. Guide rod; 19. Guide sleeve; 20. Limiting post; 21. Second centering sleeve; 22. Small spindle; 23. Second top pin; 24. Small end inner hole surface; 25. Large end end face; 26. Positioning screw; 27. U-shaped pressure plate; 28. First tightening bolt; 29. ​​Push-pull rod; 30. Small end outer blank surface; 31. Locking nut; 32. Hinge seat; 33. Second tightening bolt; 34. Middle part of the bent pipe. Detailed Implementation

[0041] To make the technical problems solved by this utility model, the technical solutions adopted, and the technical effects achieved clearer, this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not all of them.

[0042] like Figure 1-5 As shown in the figure, the frame-type horizontal clamping fixture for an air intake aluminum bend provided in this embodiment of the present invention includes: a base plate 2;

[0043] A left column 10 and a right column 11 are respectively provided at both ends of the base plate 2; a centering clamping mechanism is provided between the left column 10 and the right column 11; a movable centering mechanism is provided on the front side of the left column 10 and the right column 11; and a clamping mechanism is provided on the outer side of both the left column 10 and the right column 11.

[0044] The centering and clamping mechanism includes: a positioning plate, a first centering sleeve 12, a large spindle 14, and a first top pin 15; the positioning plate is fixed between the left column 10 and the right column 11; the first centering sleeve 12 passes through the middle of the positioning plate; the first top pin 15 is circumferentially movably inserted through the outer wall of the first centering sleeve 12; a large end cap is provided at the upper end of the first centering sleeve 12; the large spindle 14 is threaded inside the first centering sleeve 12; the positioning plate is at an angle of 45° to the horizontal position.

[0045] The movable centering mechanism includes: a movable positioning plate, a guide rod 18, a guide sleeve 19, a second centering sleeve 21, a small mandrel 22, and a second top pin; the guide sleeve 19 is embedded in the front side of both the left column 10 and the right column 11; the guide rod 18 is respectively provided at both ends of the rear side of the movable positioning plate; the guide rod 18 can move within the guide sleeve 19; the second centering sleeve 21 passes through the middle of the movable positioning plate; a small end cap is provided at the end of the second centering sleeve 21 near the guide sleeve 19; a second top pin 23 is circumferentially movably passed through the outer wall of the second centering sleeve 21; the small mandrel 22 is threaded into the second centering sleeve 21.

[0046] The clamping mechanism includes a push-pull rod 29 and an arc-shaped clamping block 13; the push-pull rod 29 is threaded onto both the left column 10 and the right column 11; a locking nut 31 is fitted onto the push-pull rod 29. An arc-shaped clamping block 13 is provided at one end of the push-pull rod 29 located between the left column 10 and the right column 11; the arc-shaped clamping block 13 on the left side does not contact the left column 10; the arc-shaped clamping block 13 on the right side does not contact the right column 11.

[0047] The large spindle 14 is threaded inside the first centering sleeve; the upper end of the large spindle 14 is provided with a tapered surface; the inner end of the first top pin 15 is provided with a tapered surface; the tapered surface of the large spindle 14 can mate with the tapered surface of the first top pin 15. The outer end face of the first top pin 15 and the circumferential surface of the first centering sleeve are respectively provided with a first groove and a second groove; the first groove communicates with the second groove; and the first groove is located inside the second groove and can overlap with a part of the second groove, and a first O-ring is provided in the groove formed by the two.

[0048] Limiting posts 20 are respectively provided at both ends of the movable positioning plate and on the side of the guide rod 18.

[0049] A rear clamping mechanism is provided on the rear side of the left column 10 and the right column 11. The rear clamping mechanism includes: a support, a second tightening bolt, a wing nut 6, a hinge shaft 7, a support plate 8, and a hinge seat 32. The hinge seat 32 is located on the rear side of the right column 11. One end of the hinge shaft 7 is connected to the hinge seat 32 via a pin. The support is located on the rear side of the left column 10. One end of the support plate 8 is hinged to the support. The other end of the support plate 8 is provided with a U-shaped opening. The other end of the hinge shaft 7 can extend into the U-shaped opening. A second tightening bolt 33 is provided in the middle of the support plate 8. The wing nut 6 is locked to the end of the hinge shaft 7.

[0050] Positioning screws 26 are respectively provided on the upper end of the positioning plate and on both sides of the first centering sleeve; a U-shaped pressure plate 27 is movably provided on the upper end of the positioning plate.

[0051] A handle 17 is provided on the front side of the movable positioning plate. Notches are provided at the rear of both the left column 10 and the right column 11.

[0052] The working process of this utility model is as follows: First, the fixture is hoisted onto the worktable 1 of the horizontal machining center. The two reference edges of the base plate 2 are placed close to the two base plate positioning plates 3 on the worktable 1, and the internal hex screws are tightened. Then, the T-block 4 is inserted into the T-slot of the worktable 1, corresponding to the bottom of the fixture base plate mounting hole 5, and the internal hex screws are tightened. This completes the positioning and clamping of the fixture on the horizontal machining center.

[0053] Loosen the wing nut 6, rotate the hinge shaft 7 outwards away from the U-shaped opening 9 of the support plate 8, then rotate the support plate 8 approximately 180° to open the space between the left column 10 and the right column 11, facilitating the insertion of the aluminum bent tube product. Hold the aluminum bent tube with the small end up and the large end down, and place it vertically into the clamp. Fit the large end into the first centering sleeve 12, and place the small end between the two arc-shaped clamping blocks 13. Screw the large mandrel 14 inwards, and the three first top pins 15 move outwards simultaneously until they all contact and are positioned with the inner hole surface 16 of the large end of the aluminum bent tube.

[0054] Holding the handle 17 of the three-point centering mechanism with the guide rod 18 facing downwards, guide the guide rod 18 into the guide sleeve 19 until the two limiting pins 20 contact and limit the front surfaces of the left column 10 and right column 11 respectively. At this time, the second centering sleeve 21 also enters the inner hole of the small end of the aluminum bend. Screw the small mandrel 22 inwards, and the three second top pins 23 move outwards simultaneously until they all contact and are positioned with the inner hole surface 24 of the small end of the aluminum bend.

[0055] At this point, check whether the end face 25 of the large end of the aluminum bend is in contact with the two positioning screws 26. If there is a gap, simultaneously screw in or out the large mandrel 14 and the small mandrel 22 until the inner hole surface 24 of the small end, the inner hole surface 16 of the large end, and the end face 25 are all in contact and positioned. Move the U-shaped pressure plate 27 obliquely upwards and onto the aluminum bend until it is above the two positioning screws 26, and tighten the first tightening bolt 28. Then tighten the push-pull rods 29 of the left clamping mechanism and the right clamping mechanism so that the two arc-shaped clamping blocks 13 contact and clamp the outer blank surface 30 of the small end of the aluminum bend.

[0056] Rotate the small mandrel 22 outwards, move the three second top pins 23 inwards, away from the inner hole surface 16 of the small end of the aluminum bend, hold the handle 17, and take out the movable three-point centering mechanism.

[0057] Double-check that both push-pull rods 29 are tightened and that the locking nuts 31 and U-shaped pressure plates 27 are securely tightened with bolts 28. Then rotate the support plate 8 until it engages with the hinge seat 32, rotate the hinge shaft 7 inwards into the U-shaped opening 9 of the support plate 8, and tighten the wing nut 6. Tighten the second tightening bolt 33, which will contact and clamp the middle portion 34 of the aluminum bend. This completes the positioning and clamping of the aluminum bend within the fixture, and processing can begin.

[0058] After the aluminum tube bending process is completed, use an air gun to remove chips, cutting fluid, etc. from the fixture and the aluminum tube product. Loosen the second tightening bolt 33, loosen the wing nut 6, and rotate the hinge shaft 7 outwards away from the U-shaped opening 9 of the support plate 8. Then rotate the support plate 8 approximately 180° to open the space between the left column 10 and the right column 11. Loosen the first tightening bolt 28, and move the U-shaped pressure plate 27 diagonally downwards to detach it from the aluminum tube product. Loosen the two locking nuts 31 and the two push-pull rods 29 to move the two arc-shaped clamping blocks 13 outwards, away from the outer blank surface 30 of the small end of the aluminum tube. Remove the aluminum tube product. Repeat the above steps when reinstalling the aluminum tube product.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications to the technical solutions described in the foregoing embodiments, or equivalent substitutions for some or all of the technical features, do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A frame-type horizontal machining clamp for an air intake aluminum bend, characterized in that, include: Base plate (2); A left column (10) and a right column (11) are respectively provided at both ends of the base plate (2); a centering clamping mechanism is provided between the left column (10) and the right column (11); a movable centering mechanism is provided on the front side of the left column (10) and the right column (11); a clamping mechanism is provided on the outer side of the left column (10) and the right column (11); The centering clamping mechanism includes: a positioning plate, a first centering sleeve (12), a large spindle (14), and a first top pin (15); the positioning plate is fixed between the left column (10) and the right column (11); the first centering sleeve (12) passes through the middle of the positioning plate; the first top pin (15) is circumferentially movably passed through the outer wall of the first centering sleeve (12); a large end cap is provided at the upper end of the first centering sleeve (12); the large spindle (14) is threaded inside the first centering sleeve (12); The movable centering mechanism includes: a movable positioning plate, a guide rod (18), a guide sleeve (19), a second centering sleeve (21), a small mandrel (22), and a second top pin; the left column (10) and the right column (11) are both fitted with guide sleeves (19); the movable positioning plate is provided with guide rods (18) at both ends of its rear side; the guide rods (18) can move within the guide sleeves (19); the movable positioning plate is provided with a second centering sleeve (21) in the middle; a small end cap is provided at the end of the second centering sleeve (21) near the guide sleeve (19); a second top pin (23) is circumferentially inserted through the outer wall of the second centering sleeve (21); the small mandrel (22) is threaded into the second centering sleeve (21); The clamping mechanism includes: a push-pull rod (29) and an arc-shaped clamping block (13); the push-pull rod (29) is threaded on both the left column (10) and the right column (11); the arc-shaped clamping block (13) is provided at one end of the push-pull rod (29) located between the left column (10) and the right column (11).

2. The frame-type horizontal machining fixture for the intake aluminum bend according to claim 1, characterized in that, The large spindle (14) is threaded inside the first centering sleeve; the upper end of the large spindle (14) is provided with a tapered surface; the inner end of the first top pin (15) is provided with a tapered surface; the tapered surface of the large spindle (14) can cooperate with the tapered surface of the first top pin (15).

3. The frame-type horizontal clamping fixture for the intake aluminum bend according to claim 2, characterized in that, The outer end face of the first top pin (15) and the circumferential direction of the first centering sleeve are respectively provided with a first groove and a second groove; the first groove can communicate with the second groove; a first O-ring is provided in the first groove and the second groove.

4. The frame-type horizontal machining fixture for the intake aluminum bend according to claim 1, characterized in that, Limiting posts (20) are respectively provided at both ends of the movable positioning plate and on the side of the guide rod (18).

5. The frame-type horizontal machining fixture for the intake aluminum bend according to claim 1, characterized in that, A locking nut (31) is fitted onto the push-pull rod (29).

6. The frame-type horizontal machining fixture for the intake aluminum bend according to claim 1, characterized in that, The left column (10) and right column (11) are provided with rear clamping mechanisms; The rear clamping mechanism includes: a support, a second tightening bolt, a wing nut (6), a hinge shaft (7), a support plate (8), and a hinge seat (32); The hinge seat (32) is located on the rear side of the right column (11); one end of the hinge shaft (7) is connected to the hinge seat (32) via a pin; the support is located on the rear side of the left column (10); one end of the support plate (8) is hinged to the support; the other end of the support plate (8) is provided with a U-shaped opening; the other end of the hinge shaft (7) can extend into the U-shaped opening; a second tightening bolt (33) is provided in the middle of the support plate (8); The wing nut (6) is engaged with the end of the hinge shaft (7) for locking.

7. The frame-type horizontal machining fixture for the intake aluminum bend according to claim 1, characterized in that, Positioning screws (26) are respectively provided on the upper end of the positioning plate and on both sides of the first centering sleeve; a U-shaped pressure plate (27) is movably provided on the upper end of the positioning plate.

8. The frame-type horizontal machining fixture for the intake aluminum bend according to claim 1, characterized in that, The angle between the positioning plate and the horizontal position is 35-55°.

9. The frame-type horizontal machining fixture for the intake aluminum bend according to claim 1, characterized in that, A handle (17) is provided on the front side of the movable positioning plate.

10. The frame-type horizontal machining fixture for the intake aluminum bend according to claim 1, characterized in that, Both the left column (10) and the right column (11) have notches at their rear.

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