Special shape clamp for milling rocker arm

Abstract

The utility model discloses a special shape clamp for milling a rocker arm, which comprises a bottom plate, a clamp body, a rotating pin, a positioning block, a positioning bolt and a fastening bolt, a fan-shaped groove is arranged in the top plane of the bottom plate, and an arc waist-shaped hole is arranged in the bottom surface of the fan-shaped groove; a fan-shaped notch is formed in the bottom of the kidney-shaped hole and in the bottom plane of the bottom plate, and a stepped hole is formed in the circle center of the fan-shaped notch; the rotating pin is mounted in the bottom plate from bottom to top, and the rotating pin and the stepped hole are positioned in an interference fit manner; a through rectangular groove is formed in the middle of the upper half portion of the clamp body, two fastening bolts which are the same in height and arranged at intervals are arranged on one side face of the clamp body, a positioning groove is formed in the upper end of one side of the clamp body in the length direction, and the positioning block is arranged in the positioning groove in a matched mode. The end of the rotating pin is connected with one end of the bottom of the clamp body, the positioning bolt penetrates through the kidney-shaped hole, and the end of the positioning bolt is connected with the other end of the bottom of the clamp body. The utility model solves the problems that the arc surface of a certain rocker arm is difficult to clamp and the machining precision is difficult to guarantee.

Description

TECHNICAL FIELD

[0001] The utility model relates to a special appearance clamp for milling rocker arm belongs to mechanical technical field. BACKGROUND

[0002] In the field of mechanical processing, many stamping or casting shaped bending parts are often involved, and the arc at the bending part and the arc of the two end faces of the bending part need to be processed, simple flat mouthed vices, indexing heads and pressing plates and other tools are used for clamping, but such clamping methods are difficult or even impossible to clamp the parts, it is difficult or even impossible to guarantee the size requirements and shape tolerance, resulting in low processing efficiency and unguaranteed quality. SUMMARY

[0003] In order to overcome the deficiencies of the prior art, the utility model provides a special appearance clamp for milling rocker arm, which solves the problems of difficult clamping of some rocker arm camber surfaces and difficulty in guaranteeing processing precision.

[0004] The utility model discloses a special appearance clamp for milling rocker arm, which comprises a bottom plate, a clamping body, a rotating pin, a positioning block, a positioning bolt and a fastening bolt.

[0005] The rotating pin is installed in the bottom plate from bottom to top, and the rotating pin is positioned by interference fit with the stepped hole. The clamping body is a block-shaped body with rounded corners on both sides, and is arranged vertically.

[0006] The end of the rotating pin is connected with one end of the bottom of the clamping body, the positioning bolt is inserted into the waist-shaped hole from bottom to top, and the end of the positioning bolt is threadedly connected with the other end of the bottom of the clamping body.

[0007] Further, U-shaped holes are arranged on both sides of the bottom plate.

[0008] Further, the fan-shaped groove and the fan-shaped notch have the same center.

[0009] The utility model discloses beneficial effect is: the utility model solves the problem of difficult clamping when the rocker arm arc processing, cannot guarantee the processing accuracy, the problem of low processing efficiency, and the fixture is convenient to use the pressing plate and bolt fastening on the workbench, the bottom plate is equipped with the fan -shaped slot that cooperates with the workpiece bending angle, uses the body of a machine to cooperate with the locating bolt and can directly ensure the processing position of workpiece, and then cooperate fastening bolt and positioning block and carry out complete positioning to workpiece, and it is convenient to process the two kinds of arcs of bending, improve processing efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0010] The utility model is further explained below in combination with the drawings and specific embodiment.

[0011] Figure 1 It is the structure schematic diagram of the utility model.

[0012] Figure 2 It is the structure schematic diagram of the utility model when using.

[0013] Figure 3 It is the schematic diagram of the bottom plate of the utility model.

[0014] Figure 4 It is Figure 3 The bottom schematic diagram of.

[0015] Figure 5 The schematic diagram of the body of a machine of the utility model.

[0016] Figure 6 The schematic diagram of the positioning block of the utility model.

[0017] Mark in drawing:

[0018] 1, bottom plate, 101, fan -shaped slot, 102, waist -shaped hole, 103, fan -shaped notch, 104, ladder hole, 105, U -shaped hole, 2, the body of a machine, 201, rectangular slot, 202, positioning slot, 3, rotating pin, 4, positioning block, 5, locating bolt, 6, fastening bolt, 7, rocker arm. SPECIFIC EMBODIMENT

[0019] As Figure 1 -6 shows, a special appearance fixture of milling rocker arm includes bottom plate 1, the body of a machine 2, rotating pin 3, positioning block 4, locating bolt 5 and fastening bolt 6, the bottom plate 1 both sides are equipped with U -shaped hole 105, and the bottom plate 1 top plane is equipped with a fan -shaped slot 101, and the bottom surface of fan -shaped slot 101 is equipped with a waist -shaped hole 102 of circular arc shape;In the bottom of this waist -shaped hole 102, the bottom plane of bottom plate 1 is equipped with a fan -shaped notch 103, and the center of fan -shaped slot 101 is equipped with a ladder hole 104;Fan -shaped slot 101 and fan -shaped notch 103 are the same center.

[0020] The rotating pin 3 is installed in the bottom plate 1 from bottom to top, and is positioned in the stepped hole 104 in an interference fit; the clamping body 2 is a block-shaped body with rounded corners on both sides, and is arranged vertically. A through rectangular slot 201 is arranged at the middle of the upper half of the clamping body 2 in the length direction of the clamping body 2. Two fastening bolts 6 of the same height and arranged at intervals are threadedly connected to one side surface of the clamping body 2. The upper end of one side of the clamping body 2 in the length direction is provided with a positioning slot 202 with chamfers on both sides. The positioning block 4 is arranged in the positioning slot 202, and the positioning block 4 is in the shape of an inverted convex character.

[0021] The end of the rotating pin 3 is connected to one end of the bottom of the clamping body 2, and the positioning bolt 5 is arranged in the waist-shaped hole 102 from bottom to top. The end of the positioning bolt 5 is threadedly connected to the other end of the bottom of the clamping body 2.

[0022] The bottom plate 1 is made of No. 50 steel material. The clamping jig can be clamped on the workbench by using a simple pressing plate and a bolt through the U-shaped holes 105 arranged on both sides of the bottom plate 1. The rotating pin 3 is made of 40Cr. The clamping body 2 is arranged around the cylindrical pin 3, and can move in the fan-shaped slot 101. The clamping body 2 is angularly positioned in two directions by cooperating with the positioning bolt 5 and the rotating pin 3. The clamping body 2 is made of No. 50 steel material, and the two ends are rounded for easy movement in the fan-shaped slot 101 of the bottom plate 1. The positioning slot 202 on the upper end surface of the clamping body 2 is chamfered on both sides for mounting and fixing the positioning block 4. The rectangular slot 201 in the clamping body 2 is used for placing the rocker arm 7 clamped as a workpiece. Two threaded holes are machined on the side surface for cooperating with the fastening bolts 6 to position the workpiece in the radial direction. The positioning block 4 is made of No. 50 steel material, and is welded to the clamping body 2 for axial positioning of the workpiece. The positioning bolt 5 and the fastening bolt 6 are standard parts with the code GB / T5782-2000, and are tightly fitted with the threaded holes on the clamping body 2 for positioning the clamping body 2 and the workpiece.

[0023] Method for using the clamp:

[0024] 1. When machining, first fix the clamp on the milling machine workbench by a pressing plate and a bolt to ensure that the clamp is parallel to the x-axis of the milling machine.

[0025] 2. Adjust the positioning bolt 5 to make the clamping body 2 abut against one side surface of the fan-shaped slot 101 in the bottom plate 1, and tighten the positioning bolt 5.

[0026] 3. Place the workpiece in the central slot of the clamping body 2. The workpiece part on one side of the rotating pin 3 is the machining end, and the other end of the workpiece abuts against the positioning block 4.

[0027] 4. Tighten the fastening bolts 6 after the workpiece abuts against the positioning block 4 to completely position the workpiece.

[0028] 5. Machining the bending circular arc.

[0029] 6. Adjust the positioning bolt 5 so that the clamp body 2 is close to the other side of the sector groove 101 in the base plate 1, and tighten the positioning bolt 5.

[0030] 7. Machining the side arcs;

[0031] 8. After processing is completed, loosen the fastening bolt 6 and remove the workpiece.

[0032] This fixture makes full use of the workpiece itself for fixation, and uses pin holes and slots for positioning to ensure machining accuracy. During use, this fixture avoids the traditional process of repeated alignment, ensuring the machining quality of the arc surface, which not only guarantees machining accuracy but also improves production efficiency and reduces production costs.

Claims

1. A special jig for milling rocker arms, characterized in that: The device includes a base plate (1), a clamping body (2), a rotating pin (3), a positioning block (4), a positioning bolt (5), and a fastening bolt (6). The top plane of the base plate (1) is provided with a fan-shaped groove (101), and the bottom surface of the fan-shaped groove (101) is provided with an arc-shaped waist-shaped hole (102). At the bottom of the waist-shaped hole (102), the bottom plane of the base plate (1) is provided with a fan-shaped notch (103), and the center of the fan-shaped groove (101) is provided with a stepped hole (104). The rotating pin (3) is installed in the base plate (1) from bottom to top. The rotating pin (3) is positioned by interference fit with the stepped hole (104). The clamp body (2) is a block with rounded corners on both sides. The clamp body (2) is arranged vertically. In the length direction of the clamp body (2), a long rectangular groove (201) is provided in the middle of the upper half of the clamp body (2). Two fastening bolts (6) of the same height and spaced apart are threaded on one side of the clamp body (2). A positioning groove (202) is provided at the upper end of one side of the clamp body (2) in the length direction. The positioning groove (202) is chamfered on both sides. The positioning block (4) is placed in the positioning groove (202). The positioning block (4) is in the shape of an inverted convex character. The end of the rotating pin (3) is connected to one end of the bottom of the clamp body (2), and the positioning bolt (5) passes through the waist-shaped hole (102) from bottom to top. The end of the positioning bolt (5) is threaded to the other end of the bottom of the clamp body (2).

2. The special profile fixture for milling rocker arms according to claim 1, characterized in that: The base plate (1) has U-shaped holes (105) on both sides.

3. The special profile fixture for milling rocker arms according to claim 1, characterized in that: The sector groove (101) and the sector notch (103) share the same center.

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