Positioning tool for cam shaft machining

Abstract

The utility model relates to a positioning tool for camshaft processing, which comprises a base, an end supporting mechanism for supporting two ends of a camshaft and a middle supporting mechanism for supporting the middle of the camshaft are arranged on the base, the end supporting mechanism comprises two groups of end supporting components, and the two groups of end supporting components are respectively arranged at two ends of the base. The middle supporting mechanism comprises two sets of middle supporting assemblies, and the two sets of middle supporting assemblies are located between the two sets of end supporting assemblies. The cam shaft is supported through the cooperation of the end supporting mechanism and the middle supporting mechanism, the end faces of the two sides of the cam shaft are positioned through the cooperation of the first end face positioning mechanism and the second end face positioning mechanism, and therefore the machining requirement of the center hole of the cam shaft can be met.

Description

TECHNICAL FIELD

[0001] The utility model relates to camshaft machining technical field especially relates to a positioning tool for camshaft machining. BACKGROUND

[0002] Camshaft belongs to the slender shaft class spare, is used for accurate control engine's admission and exhaust valve timing opening and closing. Camshaft spare needs in the production and processing process at the center of two end faces of camshaft center hole, needs to the camshaft is fixed before the implementation of the drilling operation, and the existing shaft class spare fixing tool, its structural form and the structural form of patent application number 2016107258653 basically similar, the structure of patent application number 2016107258653 includes mesa and workpiece, the left side and right side of mesa are installed V-shaped table A and V-shaped table B respectively, V-shaped table A and V-shaped table B are fixed on mesa by bolt, and the both ends of workpiece are arranged in the V-shaped through slot of V-shaped table A and V-shaped table B, the upper left side of workpiece is provided with the pressing plate, and the screw rod between the pressing plate and mesa is provided, the screw rod at the both ends of pressing plate is pre-tightened and then tightens the pressing plate, so that the pressing plate generates enough pressure to workpiece and then fixes workpiece, so that workpiece keeps stable when milling.

[0003] The above application holds the both ends of shaft piece by V-shaped table and fixes it by pressing plate, and the above structural form cannot be directly applied to the fixation of shaft piece when center hole is processed, and the main reason is that this kind of structure only tightens shaft piece and cannot position the both side end faces of shaft piece.

[0004] Based on the above technical problem, the inventor improves the existing fixing tool and proposes a positioning tool for camshaft machining, so as to meet the need of camshaft center hole processing. Utility model content

[0005] The utility model provides a positioning tool for camshaft machining in view of the deficiency of prior art.

[0006] The utility model discloses a positioning tool for camshaft machining, which is characterized by the following technical scheme, and comprises a base, end support mechanisms for supporting two ends of a camshaft and a middle support mechanism for supporting a middle part of the camshaft are arranged on the base, the end support mechanisms comprise two groups of end support assemblies, the two groups of end support assemblies are arranged at two ends of the base respectively, the middle support mechanism comprises two groups of middle support assemblies, and the two groups of middle support assemblies are located between the two groups of end support assemblies.

[0007] Preferably, the first end face positioning mechanism comprises a first mounting block and a positioning pin, the first mounting block is connected with the V-shaped support seat through bolts, a hole for inserting the positioning pin is arranged on the first mounting block, the positioning pin is vertically inserted into the hole, and one end face of the camshaft is positioned by being abutted on the positioning pin.

[0008] Preferably, the second end face positioning mechanism comprises a second mounting block and a positioning screw rod, the second mounting block is connected with the V-shaped support seat through bolts, a vertical stand rod is fixedly arranged on the second mounting block, and a horizontal positioning screw rod penetrates through the stand rod and is threadedly connected with the stand rod. The distance between the distal end of the positioning screw rod and the stand rod can be adjusted by rotating the positioning screw rod, and the camshaft of different lengths can be adjusted by fine adjustment. The other end face of the camshaft is positioned by being abutted on the positioning screw rod.

[0009] Preferably, one end of the pressing plate is provided with a through hole for penetrating the screw rod, and the other end of the pressing plate is provided with a clamping groove for embedding the other screw rod. When the camshaft is placed, the pressing plate is lifted to a certain height, the two ends of the camshaft are respectively placed on the two V-shaped support seats, the pressing plate is lowered, the pressing plate is pressed on the camshaft, and the pressing plate is limited by the nuts, so that the camshaft is fixed.

[0010] Preferably, each group of middle support assemblies comprises a fixing plate connected with the base, a pad plate is fixed on the top surface of the fixing plate, two support blocks are slidingly connected on the top surface of the pad plate, each support block is provided with a support inclined surface, and the two support inclined surfaces are oppositely arranged.

[0011] Preferably, the two support blocks are connected together through connecting bolts, and each support block is provided with a threaded through hole matched with the connecting bolt.

[0012] Preferably, a groove is provided on the top surface of the pad, and a slider embedded in the groove and capable of sliding along the groove is provided on the bottom surface of each support block. The two support blocks are connected by connecting bolts, and the distance between the two support blocks can be adjusted by rotating the connecting bolts, thus accommodating camshafts of different diameters. The two support blocks are connected together by the connecting bolts, and the entire assembly can slide along the groove. The position of the support blocks can be adjusted according to the position of the camshaft, thereby achieving auxiliary support for the camshaft from the central support component. Some camshaft parts are longer than 1.2 meters. Under the action of gravity, the middle part of the camshaft will experience slight deformation, causing slight deformation of the camshaft end face. The central support component supports the middle part of the camshaft, thereby preventing this slight deformation and improving drilling accuracy.

[0013] Preferably, the position of each end support assembly on the base is adjustable. Each mounting plate has mounting holes, and the base has elongated holes that mate with each mounting hole. The mounting holes and elongated holes are secured by bolts and nuts. The elongated holes allow for adjustment of the end support assembly's position to accommodate camshafts of different lengths.

[0014] The beneficial effects of this utility model are as follows:

[0015] This utility model supports the camshaft by using an end support mechanism and a middle support mechanism, and positions the two end faces of the camshaft by using a first end face positioning mechanism and a second end face positioning mechanism, thereby meeting the machining requirements of the camshaft center hole. Attached Figure Description

[0016] Figure 1 This is a perspective view of the assembly relationship between the end support mechanism, the middle support mechanism, and the camshaft of this utility model;

[0017] Figure 2 This is a front view of the assembly relationship between the end support mechanism, the middle support mechanism, and the camshaft of this utility model;

[0018] Figure 3 This is a perspective view of the central support component of this utility model;

[0019] Figure 4 This is a perspective view of the end support component of this utility model;

[0020] Figure 5 This is a top view of the base of this utility model;

[0021] As shown in the figure:

[0022] 1. Mounting plate, 2. V-shaped support base, 3. Screw, 4. First mounting block, 5. Locating pin, 6. Camshaft, 7. Pressure plate, 8. Nut, 9. Fixing plate, 10. Pad, 11. Connecting bolt, 12. Support block, 13. Second mounting block, 14. Upright, 15. Locating screw, 16. Slide groove, 17. Slot, 18. Long hole, 19. Base. Detailed Implementation

[0023] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0024] like Figures 1-5 As shown, this utility model includes a base 19, on which are provided end support mechanisms for supporting both ends of a camshaft 6 and a middle support mechanism for supporting the middle part of the camshaft 6. The end support mechanisms include two sets of end support assemblies, which are respectively disposed at both ends of the base 19. The middle support mechanism includes two sets of middle support assemblies, which are located between the two sets of end support assemblies. Each set of end support assemblies includes a mounting plate 1 connected to the base 19. A V-shaped support seat 2 is fixed on the top surface of the mounting plate 1. A screw 3 is provided on each side of the V-shaped support seat 2. The lower end of each screw 3 is fixed to the mounting plate 1, and the upper ends of the two screws 3 are connected by a pressure plate 7. A nut 8 for pressing the pressure plate 7 is threaded onto each screw 3. A first end face positioning mechanism is provided on one of the V-shaped support seats 2, and a second end face positioning mechanism is provided on the other V-shaped support seat 2. The first end face positioning mechanism and the second end face positioning mechanism are respectively used to position the two end faces of the camshaft 6.

[0025] In this embodiment, the first end face positioning mechanism includes a first mounting block 4 and a positioning pin 5. The first mounting block 4 is connected to the V-shaped support 2 by bolts. The first mounting block 4 is provided with a hole for the positioning pin 5 to be inserted. The positioning pin 5 is inserted vertically into the hole, and one end face of the camshaft 6 is positioned against the positioning pin 5.

[0026] In this embodiment, the second end face positioning mechanism includes a second mounting block 13 and a positioning screw 15. The second mounting block 13 is connected to the V-shaped support 2 by bolts. A vertically arranged upright 14 is fixedly mounted on the second mounting block 13. The horizontally arranged positioning screw 15 passes through the upright 14 and is threadedly connected to the upright 14. The positioning screw 15 can be adjusted by rotating its end to change the distance between it and the upright 14, allowing for fine-tuning to accommodate camshafts 6 of different lengths. The other end face of the camshaft 6 is positioned by pressing against the positioning screw 15.

[0027] In this embodiment, one end of the pressure plate 7 is provided with a through hole for the screw 3 to pass through, and the other end of the pressure plate 7 is provided with a slot 17 for another screw 3 to be inserted. When placing the camshaft 6, first place both ends of the camshaft 6 on the two V-shaped support seats 2 respectively, then lower the pressure plate 7, press the pressure plate 7 on the camshaft 6 and use nuts to limit the pressure plate 7, thereby fixing the camshaft 6.

[0028] In this embodiment, each central support assembly includes a fixing plate 9 connected to a base 19. A pad 10 is fixed to the top surface of the fixing plate 9, and two support blocks 12 are slidably connected to the top surface of the pad 10. Each support block 12 has a supporting inclined surface, and the two supporting inclined surfaces are arranged opposite to each other. The two support blocks 12 are connected together by connecting bolts 11, and each support block 12 has a threaded through hole that mates with the connecting bolts 11. Furthermore, a sliding groove 16 is provided on the top surface of the pad 10, and a slider embedded in the sliding groove 16 and sliding along the sliding groove 16 is provided on the bottom surface of each support block 12. The two support blocks 12 are connected by connecting bolts 11, and the distance between the two support blocks 12 can be adjusted by rotating the connecting bolts 11, thereby accommodating camshafts 6 of different thicknesses. The two support blocks 12 are connected together by connecting bolts 11, and the whole assembly can slide along the sliding groove 16. The position of the support blocks 12 can be adjusted according to the position of the camshaft 6, thereby realizing the auxiliary support of the central support assembly for the camshaft 6. Some camshaft 6 parts are over 1.2 meters long. Under the action of gravity, the middle part of the camshaft 6 will undergo slight deformation, causing the end face of the camshaft 6 to tilt slightly. The middle support component supports the middle part of the camshaft 6 to avoid slight deformation and improve the drilling accuracy.

[0029] In this embodiment, the position of each set of end support components on the base 19 is adjustable. Each mounting plate 1 has a mounting hole, and the base 19 has an elongated hole 18 that mates with each mounting hole. The mounting holes and the elongated holes 18 are connected by bolts and secured with nuts. The position of the end support components can be adjusted using the elongated holes 18 to accommodate camshafts 6 of different lengths.

[0030] In practical use, the camshaft 6, which requires a center hole, is placed on the positioning fixture. Both ends of the camshaft 6 rest on two sets of end support assemblies, and the two sets of middle support assemblies support the middle position of the camshaft 6. First, one end of the camshaft 6 is pressed against the positioning pin 5. Then, the positioning screw 15 is rotated to press against the other end of the camshaft 6, and the camshaft 6 is fixed by the pressure plate 7. After the camshaft 6 is fixed, the center hole is drilled on the camshaft 6.

[0031] This utility model supports the camshaft 6 by means of an end support mechanism and a middle support mechanism, and positions the two end faces of the camshaft 6 by means of a first end face positioning mechanism and a second end face positioning mechanism, thereby meeting the machining requirements of the center hole of the camshaft 6.

[0032] Of course, the above description is not limited to the examples above. Technical features of this utility model not described can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model.

Claims

1. A positioning tool for camshaft machining, characterized by: The base is provided with end support mechanisms for supporting both ends of the camshaft and a middle support mechanism for supporting the middle part of the camshaft, the end support mechanisms include two groups of end support assemblies, the two groups of end support assemblies are respectively arranged at both ends of the base, and the middle support mechanism includes two groups of middle support assemblies, which are located between the two groups of end support assemblies; each group of end support assemblies includes a mounting plate connected with the base, a V-shaped support seat is fixed on the top surface of the mounting plate, one screw rod is arranged on each side of the V-shaped support seat, the lower end of each screw rod is fixed with the mounting plate, the upper ends of the two screw rods are connected through a pressing plate, and a nut for pressing the pressing plate is threadedly connected on each screw rod; a first end face positioning mechanism is arranged on one of the V-shaped support seats, and a second end face positioning mechanism is arranged on the other V-shaped support seat, and the first end face positioning mechanism and the second end face positioning mechanism are respectively used for positioning the two side end faces of the camshaft.

2. The positioning tooling for machining of a camshaft as claimed in claim 1, characterized in that: The first end face positioning mechanism includes a first mounting block and a positioning pin, the first mounting block is connected with the V-shaped support seat through bolts, and a insertion hole for inserting the positioning pin is arranged on the first mounting block, and the positioning pin is vertically inserted into the insertion hole.

3. The positioning tooling for machining of a camshaft as claimed in claim 2, characterized in that: The second end face positioning mechanism includes a second mounting block and a positioning screw rod, the second mounting block is connected with the V-shaped support seat through bolts, a vertical stand rod is fixedly installed on the second mounting block, and a horizontal positioning screw rod penetrates through the stand rod and is threadedly connected with the stand rod.

4. The positioning tooling for machining of a camshaft as claimed in claim 1, characterized in that: One end of the pressing plate is provided with a through hole for penetrating the screw rod, and the other end of the pressing plate is provided with a clamping groove for embedding the other screw rod.

5. The positioning tooling for camshaft machining of claim 1, wherein: Each group of middle support assemblies includes a fixed plate connected with the base, a pad plate is fixed on the top surface of the fixed plate, two support blocks are slidingly connected on the top surface of the pad plate, each support block is provided with a support inclined surface, and the two support inclined surfaces are oppositely arranged.

6. A positioning tool for machining of a camshaft according to claim 5, characterized in that The two support blocks are connected together through a connecting bolt, and each support block is provided with a threaded hole matched with the connecting bolt.

7. A positioning tool for machining of a camshaft according to claim 6, characterized in that A sliding groove is arranged on the top surface of the pad plate, and a sliding block embedded in the sliding groove and capable of sliding along the sliding groove is arranged on the bottom surface of each support block.

8. The positioning tooling for camshaft machining of claim 1, wherein: The position of each group of end support assemblies on the base can be adjusted, an installation hole is arranged on each mounting plate, a long slot hole matched with each installation hole is arranged on the base, and the installation hole and the long slot hole are penetrated through bolts and fixed through nuts.

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