A positioning fixture for piston processing

Abstract

The invention discloses a positioning tool fixture for piston processing, which comprises: a support seat is fixedly connected to the upper surface of a bottom plate, a mounting hole is provided on the outer surface of the support seat, a movable sleeve is rotatably connected inside the mounting hole, a guide column is slidably connected inside the movable sleeve, an adjusting platform is fixedly connected to the left end surface of the guide column, a through groove is provided on the outer surface of the adjusting platform, a connecting seat is movably connected inside the through groove, a piston is detachably connected to the upper surface of the adjusting platform, a plug hole is provided on the outer surface of the connecting seat, a latch is detachably connected inside the plug hole; a deformation seam is provided on the outer surface of the support seat, a locking hole is provided on the upper surface of the support seat, a locking pin is movably connected inside the locking hole, the fixture is suitable for processing pistons of various specifications, and through cooperation with a machine tool and adjustment of the left and right inclination angles and horizontal displacement of the fixture, face milling of a flat-top piston and processing of various top forming surfaces of various formed top pistons can be realized after one-time assembly during piston processing.

Description

Technical Field

[0001] The invention relates to the technical field of tooling and fixtures, and in particular to a positioning tooling and fixture for piston processing. Background Art

[0002] As an important component of the internal combustion engine, most of the pistons on the market are forged parts. The surface of the forged piston needs to be further processed. Therefore, in the process of piston processing, accurate positioning fixtures are essential to ensure processing accuracy and improve production efficiency. In the past, piston processing positioning fixtures often had some limitations, such as the single applicable piston specifications, which made it difficult to meet the diverse production needs.

[0003] For the processing of different types of pistons, especially flat-top pistons and various molded top pistons, multiple fixtures or complex adjustment processes are required, which increases production costs and time costs. Moreover, during the processing, for the face milling of the piston and the processing of various molded surfaces on the top, traditional fixtures are difficult to achieve continuous processing of multiple processes after one assembly, resulting in low processing efficiency and affecting the overall production schedule and product quality. The present invention aims to solve these problems and provide a positioning fixture that is suitable for the processing of pistons of various specifications and can realize multiple processing processes through simple adjustment. Summary of the invention

[0004] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art and to provide a positioning fixture for piston processing, which is suitable for the processing of pistons of various specifications. By cooperating with a machine tool and adjusting the left and right inclination angles and horizontal displacement of the fixture, the face milling of a flat-top piston and the processing of various molding surfaces on the top of various molded top pistons can be achieved after one-time assembly during piston processing.

[0005] The present invention also provides a positioning fixture for piston processing, comprising: a bottom plate, the upper surface of the bottom plate is fixedly connected to a support seat, the outer surface of the support seat is provided with a mounting hole, the interior of the mounting hole is rotatably connected to a movable sleeve, the interior of the movable sleeve is slidably connected to a guide column, the left end surface of the guide column is fixedly connected to an adjustment platform, the outer surface of the adjustment platform is provided with a through groove, the interior of the through groove is movably connected to a connecting seat, the upper surface of the adjustment platform is detachably connected to a piston, the outer surface of the connecting seat is provided with a socket, the interior of the socket is detachably connected to a latch;

[0006] The outer surface of the guide bracket is provided with a screw hole, and the screw hole is connected with a positioning nut through a thread. The outer surface of the adjusting platform is provided with an abutment surface, and the positioning nut is movably connected with the abutment surface.

[0007] According to the piston machining positioning fixture provided by the present invention, the upper surface of the support seat is provided with an oil injection hole, and the oil injection hole is connected to the inside of the mounting hole. Lubricating oil is regularly injected into the mounting hole through the oil injection hole to effectively improve the lubrication effect of the internal moving parts.

[0008] According to a positioning fixture for piston processing provided by the present invention, a mark mark 1 is provided on the right side surface of the support seat, a scale mark 1 is fixedly connected to the outer surface of the movable sleeve, and a hand wheel 1 is fixedly connected to the right end surface of the movable sleeve. The fixed mark mark 1 provides a reference for the movement of the scale mark 1, so that the rotation angle of the movable sleeve is easy to determine.

[0009] According to a positioning fixture for piston processing provided by the present invention, the upper surface of the guide support is fixedly connected with a second scale, the upper surface of the adjustment platform is provided with a second mark, and the guide support is slidably connected with the adjustment platform. The second mark is fixed so that the movement of the second scale has a reference, so that the left and right movement distance of the adjustment platform is easy to determine.

[0010] According to the present invention, a positioning fixture for piston processing is provided, wherein the four corners of the bottom plate are provided with open screw grooves, and the support seat and the bottom plate are perpendicular to each other. The open screw grooves provided at the four corners of the bottom plate are used to connect the bottom plate with the machine tool through bolts, which facilitates the installation of the fixture, and the support seat is in a vertical state, which effectively ensures the processing accuracy.

[0011] According to a positioning fixture for piston processing provided by the present invention, the locking hole vertically penetrates the deformation gap, the lower end of the locking pin is provided with an external thread, the lower end of the locking hole is provided with an internal thread, the locking pin is threadedly connected to the locking hole, and a baffle is provided at the upper end of the locking pin and the locking hole. By tightening the locking pin, the deformation gap becomes smaller, thereby changing the inner diameter of the mounting hole, so that the movable sleeve is effectively fixed.

[0012] According to the piston machining positioning fixture provided by the present invention, the inner wall of the guide bracket is fixedly connected with guide rails on both the front and rear sides, and the outer surfaces of the front and rear sides of the adjustment platform are provided with guide grooves, which are slidably connected with the guide rails, so as to effectively realize the horizontal movement of the adjustment platform.

[0013] According to the present invention, a positioning fixture for piston processing is provided, wherein the side surface of the piston is provided with a piston pin hole, the plug is connected to the piston pin hole, and the lower surface of the piston is in contact with the upper surface of the adjustment platform. The plug is passed through the piston pin hole on the piston and the plug hole on the connecting seat to achieve connection between the piston and the connecting seat during processing.

[0014] Compared with the prior art, the present invention provides a positioning fixture for piston processing, which is suitable for processing pistons of various specifications. By cooperating with a machine tool and adjusting the left and right inclination angles and horizontal displacement of the fixture, the face milling of a flat-top piston and the processing of various molding surfaces on the top of various molded top pistons can be achieved after one-time assembly during piston processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention is further described below in conjunction with the accompanying drawings and embodiments;

[0016] Figure 1 This is an overall structural diagram of a positioning fixture for piston processing according to the present invention;

[0017] Figure 2 A bottom view of a positioning fixture for piston processing according to the present invention;

[0018] Figure 3 A top view of a positioning fixture for piston processing according to the present invention;

[0019] Figure 4 It is a side view of a positioning fixture for piston processing of the present invention;

[0020] Figure 5 The exploded view is a positioning fixture for piston processing according to the present invention.

[0021] Legend:

[0022] 1. Base plate; 2. Support seat; 3. Open screw groove; 4. Expansion joint; 5. Locking pin; 6. Oil filling hole; 7. Marking point one; 8. Movable sleeve; 9. Hand wheel one; 10. Ruler one; 11. Hand wheel two; 12. Rotating seat; 13. Adjusting table; 14. Piston; 15. Pin; 16. Screw hole; 17. Guide support; 18. Ruler two; 19. Marking point two; 20. Locking nut; 21. Pull-down bolt; 22. Slider; 23. Slide groove; 24. Positioning nut; 25. Connecting seat; 26. Through groove; 27. Guide groove; 28. Abutment surface; 29. ​​Guide rail; 30. Screw rod; 31. Guide column; 32. Long hole; 33. Mounting hole; 34. Locking hole. DETAILED DESCRIPTION

[0023] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0024] Reference Figure 1-5 The embodiment of the present invention is a positioning fixture for piston processing, which includes: a base plate 1, which is used to connect with a machine tool to facilitate the assembly of the fixture. A support seat 2 is fixedly connected to the upper surface of the base plate 1, which is used to support and adjust the components used to fix the piston 14. Open screw grooves 3 are provided at the four corners of the base plate 1 for bolt connection so that it can be effectively assembled on the machine tool. The support seat 2 and the base plate 1 are perpendicular to each other. A mounting hole 33 is provided on the outer surface of the support seat 2, and a movable sleeve 8 is rotatably connected to the inside of the mounting hole 33, and a guide column 31 is slidably connected to the inside of the movable sleeve 8. The left end face of the guide column 31 is fixedly connected to an adjusting platform 13 for installing various types of pistons 14. The upper surface of the adjusting platform 13 is a flat surface, so that the piston 14 is in a horizontal state after installation. The outer surface of the adjusting platform 13 is provided with a through groove 26, and the interior of the through groove 26 is movably connected with a connecting seat 25. The upper surface of the adjusting platform 13 is detachably connected with a piston 14, and the side surface of the piston 14 is provided with a piston pin hole, and the plug 15 is connected with the piston pin hole. The lower surface of the piston 14 abuts against the upper surface of the adjusting platform 13. The outer surface of the connecting seat 25 is provided with a plug hole, and the interior of the plug hole is detachably connected with the plug pin 15, which is used to fix the piston 14 so that it is connected to the connecting seat 25.

[0025] The outer surface of the support seat 2 is provided with a deformation seam 4, and a structural seam reserved for the reduction of the inner diameter of the mounting hole 33. The upper surface of the support seat 2 is provided with a locking hole 34, and the locking hole 34 vertically penetrates the deformation seam 4. The lower end of the locking pin 5 is provided with an external thread, and the lower end of the locking hole 34 is provided with an internal thread. The locking pin 5 is threadedly connected with the locking hole 34, and a baffle is provided at the upper end of the locking pin 5 and the locking hole 34. The locking hole 34 is movably connected with the locking pin 5. The locking pin 5 is manually rotated to move into the locking hole 34. Under the downward pressure of the baffle, the gap of the deformation seam 4 is reduced, and the inner diameter of the mounting hole 33 is reduced, thereby locking the movable sleeve 8 inside. The left surface of the movable sleeve 8 is fixedly connected with a guide bracket 17, and the upper surface of the guide bracket 17 is fixedly connected with a scale 2 18. The upper surface of the adjustment platform 13 is provided with a punctuation 2 19, and the guide bracket 17 is slidably connected with the adjustment platform 13. The lower surface of the guide bracket 17 is provided with a slide groove 23, and a slider 22 is slidably connected inside the slide groove 23. The outer surface of the slider 22 is provided with a through hole to facilitate the pull-down bolt 21 to pass through the inside. The lower surface of the slider 22 is rotatably connected with a locking nut 20, and the locking nut 20 is threadedly connected with the pull-down bolt 21, which is used to adjust the overall height position of the connecting seat 25. When the piston 14 is installed, the pull-down bolt 21 tightens the connecting seat 25 by tightening the locking nut 20, and the bottom of the piston 14 contacts the surface of the adjustment platform 13, which plays a role in fixing the piston. The upper end surface of the pull-down bolt 21 is fixedly connected to the lower surface of the connecting seat 25.

[0026] The guide column 31 is provided with a long hole 32 inside, and the long hole 32 provides an effective movable distance for the screw rod 30 to realize the horizontal movement of the adjustment platform 13 on the guide bracket 17. The end of the long hole 32 is fixedly connected with a screw nut. The right outer surface of the movable sleeve 8 is fixedly connected with a rotating seat 12. The inner ring of the rotating seat 12 is rotatably connected with the hand wheel 2 11, which is used to adjust the left and right movement of the adjustment platform 13. The outer surface of the hand wheel 2 11 is fixedly connected with a screw rod 30, and the screw rod 30 is connected to the screw nut. The outer surface of the guide bracket 17 is provided with a screw hole 16, and the screw hole 16 is connected with a positioning nut 24 through a thread. The outer surface of the adjustment platform 13 is provided with an abutment surface 28, and the positioning nut 24 is movably connected with the abutment surface 28. The front and rear sides of the inner wall of the guide bracket 17 are fixedly connected with guide rails 29, and the front and rear outer surfaces of the adjustment platform 13 are provided with guide grooves 27, and the guide grooves 27 are slidably connected with the guide rails 29. The upper surface of the support base 2 is provided with an oil filling hole 6, which is connected to the inside of the mounting hole 33. The right side surface of the support base 2 is provided with a mark 7, the outer surface of the movable sleeve 8 is fixedly connected with a ruler 10, and the right end surface of the movable sleeve 8 is fixedly connected with a hand wheel 9, which is used to manually adjust the rotation angle of the movable sleeve 8 to adjust the tilt angle of the adjustment platform 13.

[0027] Working principle: When in use, the clamp is installed on the machine tool through the base plate 1, and the bolt is passed through the open screw groove 3 to achieve a fixed connection with the machine tool. After the connecting seat 25 is adjusted to an appropriate height through the locking nut 20, the piston 14 is installed on the connecting seat 25, and the piston pin hole and the socket on the connecting seat 25 are aligned with each other, and the plug pin 15 is inserted from the right piston pin hole of the piston 14, and passes through the socket on the connecting seat 25 and then passes out from the left piston pin hole of the piston 14, and the locking nut 20 is turned to make the pull-down bolt 21 pull the connecting seat 25 downward. At this time, the bottom surface of the skirt of the piston 14 contacts the adjusting platform 13 and presses against each other, and the hand wheel 9 is manually adjusted to make the movable sleeve 8 rotate. According to the processing requirements, the movable sleeve 8 rotates through the ruler 10 and the punctuation mark 7 as a reference for the rotation angle. After reaching the specified angle, the locking pin 5 is tightened. At this time, the gap of the deformation joint 4 is reduced, and the inner diameter of the mounting hole 33 is reduced accordingly. Then the movable sleeve 8 is locked and its tilt angle is fixed.

[0028] When processing and moving it horizontally, the positioning nut 24 and the locking nut 20 are loosened respectively. After turning the hand wheel 11, the screw 30 rotates, so that the adjusting table 13 can move left and right. When moving, the punctuation mark 19 and the scale 18 are used as references to determine the left and right moving distance. After adjustment, the positioning nut 24 and the locking nut 20 are tightened again.

[0029] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A positioning fixture for piston processing, characterized in that: include: A bottom plate (1), wherein the upper surface of the bottom plate (1) is fixedly connected to a support seat (2), the outer surface of the support seat (2) is provided with a mounting hole (33), the interior of the mounting hole (33) is rotatably connected to a movable sleeve (8), the interior of the movable sleeve (8) is slidably connected to a guide column (31), the left end surface of the guide column (31) is fixedly connected to an adjustment platform (13), the outer surface of the adjustment platform (13) is provided with a through groove (26), the interior of the through groove (26) is movably connected to a connection seat (25), the upper surface of the adjustment platform (13) is detachably connected to a piston (14), the outer surface of the connection seat (25) is provided with a socket, the interior of the socket is detachably connected to a latch (15); The outer surface of the support seat (2) is provided with a deformation seam (4), the upper surface of the support seat (2) is provided with a locking hole (34), the interior of the locking hole (34) is movably connected with a locking pin (5), the left surface of the movable sleeve (8) is fixedly connected with a guide bracket (17), the lower surface of the guide bracket (17) is provided with a sliding groove (23), the interior of the sliding groove (23) is slidably connected with a slider (22), the lower surface of the slider (22) is rotatably connected with a locking nut (20), the locking nut (20) is threadedly connected with a pull-down bolt (21), and the upper end surface of the pull-down bolt (21) is fixedly connected to the lower surface of the connecting seat (25); The guide column (31) is provided with a long hole (32) inside, and a screw nut is fixedly connected to the end of the long hole (32); the right outer surface of the movable sleeve (8) is fixedly connected to a rotating seat (12); the inner ring of the rotating seat (12) is rotatably connected to a hand-operated wheel (11); the outer surface of the hand-operated wheel (11) is fixedly connected to a screw (30); the screw (30) is connected to the screw nut; the outer surface of the guide bracket (17) is provided with a screw hole (16); the screw hole (16) is connected to a positioning nut (24) through a thread; the outer surface of the adjusting platform (13) is provided with an abutting surface (28); the positioning nut (24) is movably connected to the abutting surface (28); By using the deformation seam (4) in conjunction with the locking pin (5), the movable sleeve (8) can be clamped and fixed quickly and stably before and after the angle of the movable sleeve (8) is adjusted, and surface contact is utilized to improve the fixing effect.

2. A positioning fixture for piston processing according to claim 1, characterized in that: An oil filling hole (6) is provided on the upper surface of the support seat (2), and the oil filling hole (6) is communicated with the interior of the mounting hole (33).

3. A positioning fixture for piston processing according to claim 1, characterized in that: A mark mark (7) is provided on the right side surface of the support seat (2), a scale (10) is fixedly connected to the outer surface of the movable sleeve (8), and a hand wheel (9) is fixedly connected to the right end surface of the movable sleeve (8).

4. A positioning fixture for piston processing according to claim 1, characterized in that: A second scale (18) is fixedly connected to the upper surface of the guide bracket (17), a second punctuation mark (19) is provided on the upper surface of the adjustment platform (13), and the guide bracket (17) is slidably connected to the adjustment platform (13).

5. The positioning fixture for piston processing according to claim 1, characterized in that: Open screw grooves (3) are provided at the four corners of the bottom plate (1), and the support seat (2) and the bottom plate (1) are perpendicular to each other.

6. A positioning fixture for piston processing according to claim 1, characterized in that: The locking hole (34) vertically penetrates the deformation joint (4); the lower end of the locking pin (5) is provided with an external thread; the lower end of the locking hole (34) is provided with an internal thread; the locking pin (5) and the locking hole (34) are threadedly connected; and a baffle is provided at the upper end of the locking pin (5) and the locking hole (34).

7. A positioning fixture for piston processing according to claim 1, characterized in that: The front and rear sides of the inner wall of the guide bracket (17) are fixedly connected to guide rails (29), and the front and rear sides of the outer surface of the adjustment platform (13) are provided with guide grooves (27), and the guide grooves (27) are slidably connected to the guide rails (29).

8. The positioning fixture for piston processing according to claim 1, characterized in that: A piston pin hole is provided on the side surface of the piston (14), the latch pin (15) is connected to the piston pin hole, and the lower surface of the piston (14) abuts against the upper surface of the adjustment platform (13).

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