Vertical clamp for large diesel engine body

Abstract

A clamp body of the large diesel engine body vertical clamp is of a rectangular frame structure with a protrusion in the middle. The clamp body is fixedly connected with a machine tool workbench; the cam shaft hole clamping mechanism is provided with a cam shaft hole pull rod positioning sleeve which is in clearance fit with a first-gear machine body cam shaft hole and a last-gear machine body cam shaft hole; the two cam shaft hole pull rod positioning sleeves are respectively mounted at the head end and the tail end of the cam shaft hole pull rod in an interference fit manner; a cam shaft hole fork-shaped pressing plate used for positioning a cam shaft hole pull rod is installed on the clamp body. The main shaft hole clamping mechanism is provided with a main shaft hole pull rod positioning sleeve which is in clearance fit with a first-gear machine body main shaft hole and a last-gear machine body main shaft hole; the two spindle hole pull rod positioning sleeves are respectively mounted at the head end and the tail end of the spindle hole pull rod in an interference fit manner; a main shaft hole fork-shaped pressing plate used for positioning the main shaft hole pull rod is installed on the clamp body. A plurality of side face positioning blocks are arranged on the periphery of the machine body. The utility model is favorable for ensuring the processing precision and processing quality of the workpiece.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical processing, and in particular relates to a vertical clamp for a large diesel engine body. Background Art

[0002] The diesel engine block is the installation base for various mechanisms and systems of the diesel engine. It is the assembly base for the crank-connecting rod mechanism, valve mechanism and major components of various systems of the diesel engine. The water jacket and oil channels inside the engine block are components of the cooling system and lubrication system. Therefore, all major parts and accessories of the diesel engine are installed inside and outside the engine block.

[0003] Therefore, there are quite a lot of surfaces and holes to be processed distributed around the machine body. In the prior art, the processing of the planes and holes around the machine body is carried out by positioning and clamping with a vertical fixture and processing on a rotary table of a horizontal boring and milling machine.

[0004] In the prior art vertical fixture, the workpiece is positioned by the end face of the machine body and two positioning holes on the end face, and the workpiece is pressed by pressing the windows on both sides of the machine body using pressing plates arranged on both sides of the machine body.

[0005] The vertical clamps in the prior art are only suitable for small and medium-sized engine bodies with shorter lengths. For large engine bodies with longer lengths, such as a certain type of V20 diesel engine with a length of 2.6 meters, if the pressure plate is at a relatively low height, the workpiece will vibrate during processing, affecting the processing accuracy. In order to avoid vibration of the workpiece, the pressure plate needs to be at a very high height, and the operator needs to work at high altitude to clamp the workpiece, which does not meet the safety production regulations.

[0006] In addition, the pressure plates are set on both sides of the workpiece, which will also affect the processing of the planes and holes on both sides of the machine body, and the pressure plates need to be adjusted frequently. Utility Model Content

[0007] In order to solve the above technical problems, the utility model provides a vertical clamp for a large diesel engine body.

[0008] The utility model adopts the following technical solutions to achieve the above purpose:

[0009] A vertical clamp for a large diesel engine body, the vertical clamp for a large diesel engine body has a clamp body for being fixedly connected with a machine tool worktable and positioning and supporting the diesel engine body; the clamp body is a rectangular frame structure with a protrusion in the middle; a clamp rotation positioning pin penetrating the clamp body is installed in the middle of the clamp body, and the clamp body is installed in the center hole of the machine tool worktable through the clamp rotation positioning pin; after the clamp body is rotated and positioned relative to the machine tool worktable, the clamp body is fixedly connected with the machine tool worktable through studs and nuts on all sides; the vertical clamp for a large diesel engine body also has a camshaft hole clamping mechanism and a spindle hole clamping mechanism; the camshaft hole clamping mechanism has a first gear body camshaft hole, A camshaft hole pull rod positioning sleeve with clearance fit of the camshaft hole of the last gear body; two camshaft hole pull rod positioning sleeves are respectively installed at the head and tail ends of the camshaft hole pull rod with interference fit; a camshaft hole fork-shaped pressure plate for positioning the camshaft hole pull rod is installed on the clamp body; one end of the camshaft hole fork-shaped pressure plate has an open groove for clearance fit of the camshaft hole pull rod; the lower end surface of the camshaft hole fork-shaped pressure plate at one end of the open groove is a downwardly convex arc surface; the camshaft hole fork-shaped pressure plate is installed on the clamp body, and ensures that the thread of the head end of the camshaft hole pull rod is in the open groove of the clamping end of the camshaft hole fork-shaped pressure plate during operation; the head end of the camshaft hole pull rod is tightened by the camshaft hole fork-shaped pressure plate nut;

[0010] The spindle hole clamping mechanism is provided with a spindle hole tie rod positioning sleeve which is gap-matched with the first gear machine body spindle hole and the last gear machine body spindle hole; two spindle hole tie rod positioning sleeves are respectively installed at the head and tail ends of the spindle hole tie rod by interference fit; a spindle hole fork-shaped pressure plate for positioning the spindle hole tie rod is installed on the clamping body; one end of the spindle hole fork-shaped pressure plate is provided with an open groove which is gap-matched with the spindle hole tie rod; the lower end surface of the spindle hole fork-shaped pressure plate at one end of the open groove is a downwardly convex arc surface; the spindle hole fork-shaped pressure plate is installed on the clamping body, and ensures that the thread of the head end of the spindle hole tie rod is in the open groove of the clamping end of the spindle hole fork-shaped pressure plate during operation; the head end of the spindle hole tie rod is tightened by the spindle hole fork-shaped pressure plate nut;

[0011] A plurality of side positioning blocks are arranged around the machine body to roughly position the machine body so as to facilitate the insertion of the positioning pin into the positioning hole of the machine body; a circular positioning pin and a diamond positioning pin are provided to match the positioning hole of the machine body; a positioning pin telescopic control mechanism is provided at the lower part of the circular positioning pin and the diamond positioning pin. The positioning pin telescopic control mechanism has a handle, and the rise and fall of the circular positioning pin and the diamond positioning pin are controlled by manually controlling the rotation angle of the handle.

[0012] The camshaft hole pull rod is a slender rod-shaped part, and thread structures are arranged at both ends.

[0013] The tail end of the camshaft hole pull rod is threadedly connected with a camshaft hole cover plate; the camshaft hole cover plate is a circular plate with a circular hole in the center, and is located between the camshaft hole cover plate nut and the camshaft hole pull rod positioning sleeve.

[0014] The main shaft hole pull rod is a slender rod-shaped part, and thread structures are arranged at both ends.

[0015] The tail end of the spindle hole pull rod is threadedly connected with a spindle hole cover plate; the spindle hole cover plate is a circular plate with a circular hole in the center, and is located between the spindle hole cover plate nut and the spindle hole pull rod positioning sleeve.

[0016] The utility model provides a large diesel engine body vertical clamp, which is easy to operate and highly safe, reduces the difficulty of clamping the diesel engine body workpiece for the operator, and reduces the labor intensity.

[0017] The clamping effect of the vertical clamp is stable and reliable, which can reduce the influence of workpiece vibration during processing and is beneficial to ensuring the processing accuracy and quality of the workpiece.

[0018] The vertical fixture can be clamped in one step without interfering with the processing of the planes and holes around the diesel engine body, saving the time of clamping the engine body workpiece multiple times, reducing the processing steps of the engine body workpiece, and effectively improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the top view structure of an embodiment of the utility model;

[0020] Figure 2 It is a schematic diagram of the structure of the left view of an embodiment of the utility model;

[0021] Figure 3 for Figure 1 A cross-sectional view of

[0022] Figure 4 This is a schematic diagram of the structure of the fork-shaped pressure plate of the camshaft hole of the embodiment of the utility model;

[0023] Figure 5 for Figure 4 Top view of the .

[0024] Figure 6 It is a structural schematic diagram of the fork-shaped pressure plate of the spindle hole in an embodiment of the utility model.

[0025] Figure 7 for Figure 6 Top view of the .

[0026] In the figure: 1. clamp rotation locating pin, 2. T-nut, 3. connecting stud, 4. connecting stud nut, 5. clamp body, 6. camshaft hole pull rod, 7. camshaft hole pull rod locating sleeve, 8. camshaft hole cover plate, 9. camshaft hole cover plate nut, 10. spindle hole cover plate nut, 11. spindle hole cover plate, 12. spindle hole pull rod locating sleeve, 13 spindle hole pull rod, 14. side locating block, 15. round locating pin, 16. handle, 17. clamp body connecting groove, 18. locating support block, 19. diamond locating pin, 20. camshaft hole fork pressure plate nut, 21. camshaft hole fork pressure plate, 22. camshaft hole fork pressure plate stud nut, 23. spindle hole fork pressure plate stud nut, 24. spindle hole fork pressure plate, 25. spindle hole fork pressure plate nut. DETAILED DESCRIPTION

[0027] The utility model is now described in further detail in conjunction with the accompanying drawings and preferred embodiments.

[0028] like Figure 1 to Figure 7 As shown, the utility model provides a large diesel engine body vertical clamp to achieve the above-mentioned purpose.

[0029] The large diesel engine body vertical fixture is composed of a clamp body 5, a camshaft hole clamping mechanism, a main

[0030] It consists of an axis hole clamping mechanism, a workpiece positioning device, a fixture positioning and clamping device, etc.

[0031] The camshaft hole clamping mechanism is composed of a camshaft hole pull rod 6, a camshaft hole cover plate 8, a camshaft hole pull rod positioning sleeve 7, a camshaft hole fork-shaped pressure plate 21, a camshaft hole cover plate nut 9, a camshaft hole fork-shaped pressure plate nut 20, etc.

[0032] The camshaft hole tie rod 6 is a slender rod-shaped part, with threaded structures at both ends. The camshaft hole fork-shaped pressure plate nut 20 and the camshaft hole cover plate nut 9 are respectively installed on the threads at the first and last ends of the camshaft hole tie rod 6. The camshaft hole tie rod positioning sleeve 7 is made of non-metallic material, and there are two of them, which are respectively installed at the first and last ends of the camshaft hole tie rod 6 with interference fit. The axial position of the two camshaft hole tie rod positioning sleeves 7 in the camshaft hole tie rod 6 is determined according to the first and last gear positions of the body camshaft hole, and ensure that the two camshaft hole tie rod positioning sleeves 7 are matched with the first and last gears of the body camshaft hole during operation. The outer diameter of the camshaft hole tie rod positioning sleeve 7 is designed according to the aperture of the body camshaft hole, and forms a large clearance fit with the body camshaft hole. The camshaft hole cover plate 8 is a circular plate with a circular hole in the center. The camshaft hole cover plate 8 is sleeved on the threaded structure at the tail end of the camshaft hole pull rod 6 through the circular hole and is located between the camshaft hole cover plate nut 9 and the camshaft hole pull rod positioning sleeve 7.

[0033] The clamping end of the camshaft hole fork-shaped pressure plate 21 is provided with an open groove along the center, the width of the open groove is designed according to the outer diameter of the thread at the head end of the camshaft hole tie rod 6, and forms a large clearance fit with the thread at the head end of the camshaft hole tie rod 6, and the lower part of the clamping end of the camshaft hole fork-shaped pressure plate 21 is a convex arc surface. The camshaft hole fork-shaped pressure plate 21 is installed on the clamp body 5, and ensures that the thread at the head end of the camshaft hole tie rod 6 is in the open groove of the clamping end of the camshaft hole fork-shaped pressure plate 21 during operation.

[0034] The spindle hole clamping mechanism is composed of a spindle hole pull rod 13, a spindle hole cover plate 11, a spindle hole pull rod positioning sleeve 12, a spindle hole fork-shaped pressure plate 24, a spindle hole cover plate nut 10, a spindle hole fork-shaped pressure plate nut 25, etc.

[0035] The spindle hole tie rod 13 is a slender rod-shaped part, with threaded structures at both ends. The spindle hole fork-shaped pressure plate nut 25 and the spindle hole cover plate nut 10 are respectively installed on the threads at the first and last ends of the spindle hole tie rod 13. The spindle hole tie rod positioning sleeve 12 is a non-metallic material, and there are two of them, which are respectively installed at the first and last ends of the spindle hole tie rod 13 with interference fit. The axial position of the two spindle hole tie rod positioning sleeves 12 in the spindle hole tie rod 13 is determined according to the first and last positions of the body spindle hole, and ensure that the two spindle hole tie rod positioning sleeves are matched with the first and last gears of the body spindle hole during operation. The outer diameter of the spindle hole tie rod positioning sleeve 12 is designed according to the diameter of the body spindle hole, and forms a large clearance fit with the body spindle hole. The spindle hole cover plate 11 is a circular plate with a circular hole in the center. The spindle hole cover plate 11 is sleeved on the threaded structure at the tail end of the spindle hole pull rod 13 through the circular hole and is located between the spindle hole cover plate nut 10 and the spindle hole pull rod positioning sleeve 12.

[0036] The clamping end of the spindle hole fork-shaped clamping plate 24 is provided with an open groove along the center, the width of the open groove is designed according to the outer diameter of the thread at the head end of the spindle hole tie rod 13, and forms a large clearance fit with the thread at the head end of the spindle hole tie rod 13, and the lower part of the clamping end of the spindle hole fork-shaped clamping plate 24 is a convex arc surface. The spindle hole fork-shaped clamping plate 24 is installed on the clamp body 5, and ensures that the thread at the head end of the spindle hole tie rod 13 is in the open groove of the clamping end of the spindle hole fork-shaped clamping plate 24 during operation.

[0037] The workpiece positioning device is composed of a plurality of side positioning blocks 14, a plurality of positioning support blocks 18, a circular positioning pin 15, a diamond positioning pin 19, a positioning pin telescopic control mechanism, etc.

[0038] The side positioning blocks 14 are arranged around the machine body according to the machine body contour, and are roughly positioned to facilitate the insertion of the positioning pins into the positioning holes of the machine body. A positioning pin telescopic control mechanism is provided at the bottom of the circular positioning pin 15 and the diamond positioning pin 19. The positioning pin telescopic control mechanism has a handle 16, and the rise and fall of the circular positioning pin and the diamond positioning pin 16 are controlled by manually controlling the rotation angle of the handle 16.

[0039] The clamp positioning and pressing device is composed of a clamp rotation positioning pin 1, a clamp body connecting groove 17, a T-nut 2, a connecting stud 3, a connecting stud nut 4, etc.

[0040] The fixture rotation positioning pin 1 is installed at the center position of the bottom surface of the fixture body 5. When working, the fixture rotation positioning pin 1 cooperates with the center hole of the machine tool rotary table, and the T-nut 2 is installed in the T-slot of the machine tool table. The fixture body connection groove 17 is designed according to the position of the T-slot of the machine tool table. After the connection stud 3 is screwed into the T-nut 2, the connection stud nut 4 is installed on the connection stud 3 and tightened to position and clamp the fixture.

[0041] The utility model adopts the following technical scheme to achieve the above purpose, and the specific use method steps are as follows:

[0042] (1) Clean the surface of the machine table and the bottom surface of the clamp body 5 respectively, install the T-nut 2 in the T-slot of the machine table, install the fixture rotation positioning pin 1 in the center hole of the machine table, adjust the clamp body connection groove 17 to align with the T-slot of the machine table, screw the connecting stud 3 into the T-nut 2, and then install the connecting stud nut 4 on the connecting stud 3 and tighten it.

[0043] (2) Place the machine body to be processed horizontally with the top surface facing upward, and clean the camshaft hole of each gear, the spindle hole of each gear, and the positioning reference surface.

[0044] (3) Clean the camshaft hole tie rod 6 and camshaft hole tie rod positioning sleeve 7, and install the camshaft hole cover plate 8 and camshaft hole cover plate nut 9 onto the thread at the tail end of the camshaft hole tie rod 6 as required.

[0045] (4) Insert the head end of the camshaft hole tie rod 6 from the last gear camshaft hole of the engine body until it passes through the first gear camshaft hole, so that the two camshaft hole tie rod positioning sleeves 7 match the first gear and last gear camshaft holes of the engine body respectively.

[0046] (5) Similarly, install the other camshaft hole tie rod 6 and the main shaft hole tie rod 13 into the corresponding holes of the machine body.

[0047] (6) Clean the positioning support blocks 18 of the fixture, rotate the handle 16 to lower the circular positioning pins 15 and diamond positioning pins 19, lift the machine body vertically with the positioning end face downward using the overhead crane, move the machine body to the top of the fixture, install the machine body on the fixture under the rough positioning action of the side positioning blocks 14, make the positioning reference surface fit, rotate the handle 16 to insert the circular positioning pins 15 and diamond positioning pins 19 into the positioning holes of the machine body. If the positioning pins are blocked from insertion, slightly adjust the position of the machine body until the positioning pins can be inserted into the positioning holes of the machine body.

[0048] (7) Horizontally move the camshaft hole fork-shaped pressure plate 21 so that the thread at the head end of the camshaft hole tie rod 6 is in the open groove at the clamping end of the camshaft hole fork-shaped pressure plate 21, and the clamping end of the camshaft hole fork-shaped pressure plate 21 is above the fork-shaped pressure plate nut at the head end of the camshaft hole tie rod 6. Similarly, horizontally move the remaining camshaft hole fork-shaped pressure plates 21 and the main shaft hole fork-shaped pressure plates 24.

[0049] (8) Tighten the camshaft hole fork-shaped pressure plate stud nut 22 and the main shaft hole fork-shaped pressure plate stud nut 23 in sequence to complete the installation of the engine body.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A vertical fixture for a large diesel engine body, characterized in that: The vertical clamp of a large diesel engine body has a clamp body for being fixedly connected with a machine tool worktable and for positioning and supporting the diesel engine body; the clamp body is a rectangular frame structure with a protrusion in the middle; a clamp rotation positioning pin penetrating the clamp body is installed in the middle of the clamp body, and the clamp body is installed in the center hole of the machine tool worktable through the clamp rotation positioning pin; after the clamp body is rotated and positioned relative to the machine tool worktable, the clamp body is fixedly connected with the machine tool worktable through studs and nuts on all sides; the vertical clamp of the large diesel engine body also has a camshaft hole clamping mechanism and a spindle hole clamping mechanism; the camshaft hole clamping mechanism has a camshaft hole for the first gear body and a camshaft hole for the last gear body A camshaft hole tie rod positioning sleeve with clearance fit in the wheel axle hole; two camshaft hole tie rod positioning sleeves are respectively installed at the head and tail ends of the camshaft hole tie rod with interference fit; a camshaft hole fork-shaped pressure plate for positioning the camshaft hole tie rod is installed on the clamp body; one end of the camshaft hole fork-shaped pressure plate has an open groove for clearance fit in the camshaft hole tie rod; the lower end surface of the camshaft hole fork-shaped pressure plate at one end of the open groove is a downwardly convex arc surface; the camshaft hole fork-shaped pressure plate is installed on the clamp body and ensures that the thread of the head end of the camshaft hole tie rod is in the open groove of the clamping end of the camshaft hole fork-shaped pressure plate during operation; the head end of the camshaft hole tie rod is tightened by the camshaft hole fork-shaped pressure plate nut; The spindle hole clamping mechanism is provided with a spindle hole tie rod positioning sleeve which is gap-matched with the first gear machine body spindle hole and the last gear machine body spindle hole; two spindle hole tie rod positioning sleeves are respectively installed at the head and tail ends of the spindle hole tie rod by interference fit; a spindle hole fork-shaped pressure plate for positioning the spindle hole tie rod is installed on the clamping body; one end of the spindle hole fork-shaped pressure plate is provided with an open groove which is gap-matched with the spindle hole tie rod; the lower end surface of the spindle hole fork-shaped pressure plate at one end of the open groove is a downwardly convex arc surface; the spindle hole fork-shaped pressure plate is installed on the clamping body, and ensures that the thread of the head end of the spindle hole tie rod is in the open groove of the clamping end of the spindle hole fork-shaped pressure plate during operation; the head end of the spindle hole tie rod is tightened by the spindle hole fork-shaped pressure plate nut; A plurality of side positioning blocks are arranged around the machine body to roughly position the machine body to facilitate the insertion of the positioning pins into the positioning holes of the machine body; circular positioning pins and diamond positioning pins are provided to cooperate with the positioning holes of the machine body; a positioning pin telescopic control mechanism is provided at the lower part of the circular positioning pins and the diamond positioning pins, and the positioning pin telescopic control mechanism has a handle, and the rise and fall of the circular positioning pins and the diamond positioning pins are controlled by manually controlling the rotation angle of the handle.

2. A vertical fixture for a large diesel engine body as claimed in claim 1, characterized in that: The camshaft hole pull rod is a slender rod-shaped part, and thread structures are arranged at both ends.

3. A vertical fixture for a large diesel engine body as claimed in claim 1, characterized in that: The tail end of the camshaft hole pull rod is threadedly connected with a camshaft hole cover plate; the camshaft hole cover plate is a circular plate with a circular hole in the center, and is located between the camshaft hole cover plate nut and the camshaft hole pull rod positioning sleeve.

4. A vertical fixture for a large diesel engine body as claimed in claim 1, characterized in that: The main shaft hole pull rod is a slender rod-shaped part, and thread structures are arranged at both ends.

5. A vertical fixture for a large diesel engine body as claimed in claim 1, characterized in that: The tail end of the spindle hole pull rod is threadedly connected with a spindle hole cover plate; the spindle hole cover plate is a circular plate with a circular hole in the center, and is located between the spindle hole cover plate nut and the spindle hole pull rod positioning sleeve.

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