Positioning device for finish machining of exhaust manifold of turbocharger

Abstract

The utility model relates to a positioning device for finish machining of an exhaust manifold of a turbocharger, which comprises a base, a wedge-shaped seat is connected on the rear part of the base, and a first lever cylinder, a first linear cylinder and a second linear cylinder are sequentially arranged in the middle of the rear side of the inclined surface of the wedge-shaped seat from front to back. The lower side face of the outer end of a pressing rod of the first lever cylinder corresponds to the outer end of a piston rod of the first linear cylinder, and the upper edge of the bent end of the exhaust manifold is clamped between the two. The outer end of a piston rod of the second linear cylinder is connected with a radial expansion and contraction part, and the radial expansion and contraction part extends into the bent end of the exhaust manifold. Second lever cylinders are arranged on the inclined surfaces of the wedge-shaped seats on the two sides of the second linear cylinder; and the outer ends of pressing rods of the second lever cylinders are pressed on the two side walls of the upper part of the outer circle of the bent end of the exhaust manifold respectively. According to the utility model, the product quality can be improved and the production cost can be reduced. The positioning device is suitable for positioning during finish machining of the exhaust manifold of the turbocharger.

Description

Technical Field

[0001] This utility model relates to a clamp. Specifically, it is a positioning device used to fix the exhaust manifold on a turbocharger during precision machining. Background Technology

[0002] In the turbocharger exhaust manifold manufacturing industry, it is well known that a positioning device is required to position the turbocharger exhaust manifold during precision machining.

[0003] Currently, the positioning devices used in the precision machining of turbocharger exhaust manifolds mostly consist of a set of expansion sleeves and a set of clamping mechanisms. During operation, the expansion sleeve is first fixed to the worktable and supports the curved end of the exhaust manifold. Then, the clamping mechanism is used to hold the straight end of the exhaust manifold in place. This achieves the positioning of the exhaust manifold. Although this positioning device can clamp and position the turbocharger exhaust manifold, the need for both an expansion sleeve and a clamping mechanism requires two separate positioning operations, making it difficult to maintain consistent positioning accuracy and thus compromising the quality of the machined product. Furthermore, the requirement for both expansion sleeves and clamping mechanisms results in significant equipment investment and higher production costs. Utility Model Content

[0004] The problem this invention aims to solve is to provide a positioning device for the precision machining of turbocharger exhaust manifolds. Using this positioning device can improve product quality and reduce production costs.

[0005] The above-mentioned problems to be solved by this utility model are achieved by the following technical solutions:

[0006] This utility model discloses a positioning device for precision machining of a turbocharger exhaust manifold, comprising a base. The base is a rectangular plate with a wedge-shaped seat attached to its rear upper part. The wedge-shaped seat has a right-angled triangular cross-section, with its two straight faces parallel and perpendicular to the upper surface of the base, respectively. From front to back, a first lever cylinder, a first linear cylinder, and a second linear cylinder are sequentially located on the rear side of the wedge-shaped seat. The lower side of the outer end of the first pressure rod of the first lever cylinder corresponds to the outer end of the first piston rod of the first linear cylinder, clamping the upper edge of the curved end of the exhaust manifold between them. The outer end of the piston rod of the second linear cylinder is connected to a radial expansion and contraction part, which extends into the curved end of the exhaust manifold. A second lever cylinder is located on the inclined surface of the wedge-shaped seat on both sides of the second linear cylinder, with the outer ends of the second pressure rods of the second lever cylinder pressing against the two side walls of the upper part of the outer circumference of the curved end of the exhaust manifold.

[0007] A further improvement of this utility model is that the base and wedge-shaped seat corresponding to the second linear cylinder have corresponding through holes, and the cylinder body of the second linear cylinder is fixed in the through holes. The expansion and contraction part includes a push rod, one end of which is connected to the outer end of the piston rod of the second linear cylinder, and its outer end extends beyond the inclined surface of the wedge-shaped seat. The outer end of the push rod is tapered, and grooves are evenly distributed around its tapered end. The push rod has a bushing, the lower end of which is connected to the inclined surface of the wedge-shaped seat, and pin holes are evenly distributed around its outer end. The pin holes correspond to the grooves, and short pins are contained therein. The outer end of the short pin presses against the inner wall of the pipe wall inside the curved end of the exhaust manifold during operation.

[0008] A further improvement of this utility model is that the base has an inverted U-shaped notch at the front, and a V-shaped seat is located between the two vertical parts of the inverted U-shaped notch. A third linear cylinder is connected to the inner side of each of the two inclined parts of the V-shaped seat. The second piston rods of the two third linear cylinders are perpendicular to the inner side of the corresponding inclined part and abut against the lower side walls of the straight end outer circle of the exhaust manifold.

[0009] A further improvement of this utility model is that a first support and a second support are respectively connected to both sides of the upper surface of the base. A fourth linear cylinder and an angular support rod are respectively connected to the opposite sides of the first and second supports on the front side of the third linear cylinder. The outer end of the piston rod of the fourth linear cylinder and the outer end of the angular support rod respectively abut against the side walls of the exhaust manifold.

[0010] A further improvement of this utility model is that a fifth linear cylinder and a sixth linear cylinder are respectively connected to the first and second supports on the front side of the fourth linear cylinder and the angular support rod, and the outer ends of the piston rods of the fifth linear cylinder and the sixth linear cylinder respectively abut against the outer walls on both sides of the straight end port of the exhaust manifold.

[0011] A further improvement of this utility model is that the front end of the second support is connected to a rotary cylinder, the piston rod of which faces forward and is parallel to the upper surface of the base; the outer end of the piston rod of the rotary cylinder is connected to a third pressure rod perpendicular to it, the outer end of which is connected to an elastic pin, and the elastic pin extends into the straight end of the exhaust manifold.

[0012] As can be seen from the above scheme, during operation, the curved end and straight end of the exhaust manifold are first placed on the positioning device of this utility model with their respective ends facing the rear and front of the base. The angle cylinder is then activated, aligning the elastic pin 8 at the outer end of its third pressure rod with the straight end of the exhaust manifold. Then, the piston rod of the angle cylinder is retracted, allowing the elastic pin to extend into the straight end of the exhaust manifold. The elastic deformation capability of the elastic pin is used to precisely position the straight end of the exhaust manifold. Afterward, the second linear cylinder is activated, causing its piston rod and the push rod at its outer end to extend outward, driving the expansion and contraction part, composed of the push rod, bushing, and elastic pin in the circumferential pin hole at the outer end of the bushing, to move forward and enter the curved end of the exhaust manifold until it presses against the lower two side walls of the outer circumference of the curved end of the exhaust manifold, thus achieving the positioning of the curved end of the exhaust manifold. Compared with the prior art, this method can improve product quality and reduce production costs. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the positioning device for precision machining of turbocharger exhaust manifold according to this utility model;

[0014] Figure 2 It has a processed exhaust manifold. Figure 1 A diagram showing the view from below;

[0015] Figure 3 yes Figure 2 A schematic diagram of the AA section. Detailed Implementation

[0016] like Figure 1 , Figure 2 and Figure 3 As shown, the positioning device for precision machining of turbocharger exhaust manifold of this utility model includes a base 1, which is a rectangular plate with a wedge-shaped seat 5 connected to its rear upper part. The cross-section of the wedge-shaped seat 5 is a right-angled triangle, with its two straight surfaces parallel and perpendicular to the upper surface of the base 1, respectively. A first lever cylinder 7, a first linear cylinder 22, and a second linear cylinder 21 are sequentially arranged from front to back on the rear middle of its inclined surface. The lower side of the outer end of the first pressure rod 71 of the first lever cylinder 7 corresponds to the outer end of the first piston rod 221 of the first linear cylinder 22, clamping the upper edge of the curved end of the exhaust manifold 18 between them. The outer end of the piston rod of the second linear cylinder 21 is connected to a radial expansion and contraction part, which extends into the curved end of the exhaust manifold 18. Second lever cylinders 4 are arranged on the inclined surfaces of the wedge-shaped seats 5 on both sides of the second linear cylinder 21. The outer ends of the second pressure rods 41 of the two second lever cylinders 4 press against the upper side walls of the outer circle of the curved end of the exhaust manifold 18, respectively.

[0017] The base 1 and wedge seat 5 corresponding to the second linear cylinder 21 are both machined with corresponding through holes 20, and the cylinder body of the second linear cylinder 21 is fixed in the through hole 20. The expansion and contraction part includes a push rod 17, one end of which is connected to the outer end of the piston rod of the second linear cylinder 21, and its outer end extends beyond the inclined surface of the wedge seat 5. The outer end of the push rod 17 is tapered, and three grooves are evenly distributed around its tapered end. A bushing 19 is fitted on the push rod 17, and the two are in a movable fit. The lower end of the bushing 19 is fixed to the inclined surface of the wedge seat 5, and three pin holes are evenly distributed around its outer end. The pin holes correspond to the grooves, and short pins 6 are installed in each of them. The short pins 6 are in a movable fit with the corresponding pin holes, and their outer ends press against the inner wall of the curved end of the exhaust manifold 18 during operation.

[0018] The front of the base 1 is machined with an inverted U-shaped notch 15, and a V-shaped seat 9 is installed between the two vertical parts of the inverted U-shaped notch 15. The inner sides of the two inclined parts of the V-shaped seat 9 are connected to the third linear cylinder 12. The second piston rod 121 of the two third linear cylinders 12 is perpendicular to the inner side of the corresponding inclined part and abuts against the lower side walls of the straight end outer circle of the exhaust manifold 18.

[0019] The upper surface of the base 1 is connected to the first support 3 and the second support 8 on both sides respectively. The first support 3 and the second support 8 on the front side of the third linear cylinder 12 are connected to the fourth linear cylinder 2 and the angular support rod 13 respectively. The outer end of the piston rod of the fourth linear cylinder 2 and the outer end of the angular support rod 13 are arranged opposite to each other, and they are respectively pressed against the side walls of the exhaust manifold 18.

[0020] The fourth linear cylinder 2 and the first support 3 and the second support 8 on the front side of the angular support rod 13 are respectively connected to the fifth linear cylinder 16 and the sixth linear cylinder 11. The outer ends of the piston rods of the fifth linear cylinder 16 and the sixth linear cylinder 11 respectively abut against the outer walls on both sides of the straight end of the exhaust manifold 18.

[0021] The front end of the second support 8 is connected to a rotary cylinder 10, which is horizontally arranged with its piston rod facing forward and its longitudinal direction parallel to the upper surface of the base 1. The outer end of the piston rod of the rotary cylinder 10 is connected to a third pressure rod 101 perpendicular to it, and the outer end of the third pressure rod 101 is connected to an elastic pin 14, which extends into the straight end of the exhaust manifold 18.

[0022] During operation, first, align the curved end and straight end of the exhaust manifold 18 towards the rear and front of the base, respectively, and place it on the positioning device of this invention. Then, activate the angle cylinder 10, aligning the elastic pin 14 at the outer end of its third pressure rod 101 with the straight end of the exhaust manifold 18. Next, retract the piston rod of the angle cylinder 10, and through the third pressure rod 101, drive the elastic pin 14, causing it to extend into the straight end of the exhaust manifold 18. Utilizing the elastic deformation capability of the elastic pin 14, precise positioning of the straight end of the exhaust manifold 18 is achieved. Then, the second linear cylinder 21 is activated. Its piston rod and the push rod 17 at the outer end of the piston rod extend outward, driving the expansion and contraction part composed of the push rod 17, bushing 19 and short pins 6 in the circumferential pin hole at the outer end of the bushing 19 to move forward and enter the curved end of the exhaust manifold 18. The three short pins 6 extend outward and press against the inner wall of the curved end of the exhaust manifold 18, thereby achieving the positioning of the curved end of the turbocharger exhaust manifold.

Claims

1. A positioning device for precision machining of a turbocharger exhaust manifold, comprising a base (1), characterized in that: The base (1) is a rectangular plate with a wedge-shaped seat (5) attached to its rear top. The cross-section of the wedge-shaped seat (5) is a right triangle, with its two straight surfaces parallel and perpendicular to the upper surface of the base (1), respectively. The middle of the rear side of its inclined surface has a first lever cylinder (7), a first linear cylinder (22), and a second linear cylinder (21) in sequence from front to back. The lower side of the outer end of the first pressure rod (71) of the first lever cylinder (7) corresponds to the outer end of the first piston rod (221) of the first linear cylinder (22) and clamps the upper side of the curved end of the exhaust manifold (18) between the two. The outer end of the piston rod of the second linear cylinder (21) is connected to a radial expansion and contraction part, which extends into the curved end of the exhaust manifold (18). There are second lever cylinders (4) on the inclined surfaces of the wedge-shaped seats (5) on both sides of the second linear cylinder (21). The outer ends of the second pressure rods (41) of the second lever cylinder (4) press on the two side walls of the upper part of the outer circle of the curved end of the exhaust manifold (18).

2. The positioning device for precision machining of turbocharger exhaust manifold according to claim 1, characterized in that: The base (1) and wedge seat (5) corresponding to the second linear cylinder (21) have corresponding through holes (20), and the cylinder body of the second linear cylinder (21) is fixed in the through hole (20); the expansion and contraction part contains a push rod (17), one end of which is connected to the outer end of the piston rod of the second linear cylinder (21), and its outer end extends out of the inclined surface of the wedge seat (5); the outer end of the push rod (17) is conical, and grooves are evenly distributed around its conical end; the push rod (17) has a bushing (19), the lower end of which is connected to the inclined surface of the wedge seat (5), and pin holes are evenly distributed around its outer end; the pin holes correspond to the grooves, and there is a short pin (6) inside them, and the outer end of the short pin (6) presses against the inner side of the pipe wall inside the curved end of the exhaust manifold (18) when working.

3. The positioning device for precision machining of turbocharger exhaust manifold according to claim 1, characterized in that: The base (1) has an inverted U-shaped notch (15) at the front, and a V-shaped seat (9) is located between the two vertical parts of the inverted U-shaped notch (15); the inner sides of the two inclined parts of the V-shaped seat (9) are connected to the third linear cylinder (12), and the second piston rod (121) of the two third linear cylinders (12) is perpendicular to the inner side of the corresponding inclined part and rests on the lower side wall of the straight end outer circle of the exhaust manifold (18).

4. The positioning device for precision machining of turbocharger exhaust manifold according to claim 3, characterized in that: The upper surface of the base (1) is connected to the first support (3) and the second support (8) on both sides respectively; the first support (3) and the second support (8) on the front side of the third linear cylinder (12) are connected to the fourth linear cylinder (2) and the angular support rod (13) respectively. The outer end of the piston rod of the fourth linear cylinder (2) and the outer end of the angular support rod (13) are respectively pressed against the two side walls of the exhaust manifold (18).

5. The positioning device for precision machining of turbocharger exhaust manifold according to claim 4, characterized in that: The fifth linear cylinder (16) and the sixth linear cylinder (11) are respectively connected to the first support (3) and the second support (8) on the front side of the fourth linear cylinder (2) and the angular support rod (13). The outer ends of the piston rods of the fifth linear cylinder (16) and the sixth linear cylinder (11) are respectively pressed against the outer walls on both sides of the straight end port of the exhaust manifold (18).

6. The positioning device for finishing turbocharger exhaust manifolds according to any one of claims 1 to 5, characterized in that: The front end of the second support (8) is connected to a rotary cylinder (10), the piston rod of which faces forward and is parallel to the upper surface of the base (1); the outer end of the piston rod of the rotary cylinder (10) is connected to a third pressure rod (101) perpendicular to it, the outer end of which is connected to an elastic pin (14), the elastic pin (14) extending into the straight end of the exhaust manifold (18).

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