Vertical machining and finish-milling top surface clamp structure

Abstract

The utility model discloses a fixture structure for vertical machining and finish milling of a top surface. The fixture structure comprises a support body, a pre-positioning mechanism and a positioning and clamping mechanism, the pre-positioning mechanism comprises an end face guide rod, a lifting plate and a bottom face guide rod. The positioning and clamping mechanism comprises a positioning pin, a clamping jaw, a mounting seat and a clamping cylinder; the end face guide rods are connected to the two sides of the supporting body, the lifting plate is movably connected with the supporting body, the top of the supporting body is connected with a lifting air cylinder, a piston rod of the lifting air cylinder is connected with the lifting plate, and the bottom face guide rods are connected to the lifting plate. The positioning pin is fixedly connected to the top of the supporting body, the mounting base and the clamping cylinder are fixedly connected to the supporting body, the middle of the clamping jaw is hinged to the mounting base, and the tail end of the clamping jaw is hinged to a piston rod of the clamping cylinder. Through guiding and limiting of the end face guide rod and the bottom face guide rod, the pre-positioning function is achieved. Accurate positioning is achieved through the positioning pin, the clamping air cylinder is matched with the clamping jaw, and the cylinder body can be stably fixed.

Description

Technical Field

[0001] This utility model belongs to the field of engine processing technology, specifically a vertical milling fixture structure for precision milling of the top surface. Background Technology

[0002] In the field of engine manufacturing, the engine block, as a core component, plays a crucial role in the overall performance and quality of the engine due to its machining accuracy. The engine block undergoes multiple machining processes, among which the top surface milling process on a vertical machining center places stringent requirements on the accurate positioning and secure clamping of the block. Traditional methods of fixing engine blocks during machining have several drawbacks. First, in terms of positioning, some fixtures often fail to achieve high-precision positioning, resulting in initial positional deviations of the engine block on the vertical machining center. This affects the machining accuracy of subsequent top surface milling processes, easily leading to quality problems such as non-standard milling dimensions and poor surface flatness. In severe cases, it can even render the entire block unusable, resulting in significant cost losses.

[0003] With the continuous improvement of automation in manufacturing, automated fixtures are increasingly being applied to engine block machining. Automated hydraulic fixtures, leveraging the stable and reliable clamping force provided by hydraulic systems, have improved clamping performance to some extent. However, when practically applied to engine block machining, especially during manual loading, most existing automated hydraulic fixtures lack effective pre-positioning and limit functions. This necessitates significant time and effort to adjust the cylinder block's position to ensure its accurate entry into the subsequent clamping and machining stages, undoubtedly increasing the difficulty and time cost of loading.

[0004] Patent application CN202420925607.X discloses a milling fixture for engine block end faces, including a base with a left plate and a right plate. The left plate is equipped with a left front positioning and clamping mechanism and a left rear positioning and clamping mechanism. The left front positioning and clamping mechanism is used to position and clamp the left block, and the left rear positioning and clamping mechanism is used to position and clamp another inverted left block. The right plate is equipped with a right front positioning and clamping mechanism and a right rear positioning and clamping mechanism. This fixture can conveniently fix the cylinder block for milling operations; however, it suffers from positioning difficulties. Utility Model Content

[0005] The purpose of this utility model is to provide a vertical milling fixture structure for precision milling of the top surface, so as to solve the following technical problems mentioned in the background art:

[0006] In the existing technology, during the hoisting and loading stage, due to the lack of effective pre-positioning and limiting functions, a lot of time and effort is required to adjust the position of the cylinder, which increases the difficulty and time cost of loading.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0008] A vertical milling fixture structure for precision milling of the top surface includes a support body, a pre-positioning mechanism, and a positioning and clamping mechanism. The pre-positioning mechanism includes an end-face guide rod, a lifting plate, and a bottom-face guide rod. The positioning and clamping mechanism includes a positioning pin, a jaw, a mounting base, and a clamping cylinder. The end-face guide rods are connected to both sides of the support body. The lifting plate is movably connected to the support body. A lifting cylinder is connected to the top of the support body. The piston rod of the lifting cylinder is connected to the lifting plate. The bottom-face guide rod is connected to the lifting plate. The positioning pin is fixed to the top of the support body. The mounting base and the clamping cylinder are both fixed to the support body. The middle part of the jaw is hinged to the mounting base, and the tail end of the jaw is hinged to the piston rod of the clamping cylinder.

[0009] Furthermore, a base plate is fixed to the bottom of the support, and lifting rings are connected to both sides of the base plate.

[0010] Furthermore, end face support blocks are fixedly connected to both sides of the top of the support body, and a first guide rod clamping block is fixedly connected to the end face support block, and the end face guide rod clamping block is connected to the first guide rod clamping block.

[0011] Furthermore, several flushing heads are also connected to the end face support block.

[0012] Furthermore, second guide rod clamps are fixedly connected to the front and rear sides of the lifting plate, and the bottom guide rod is connected to the second guide rod clamps.

[0013] Furthermore, a side limiting block is fixed to the top rear side of the lifting plate, and a positioning screw is connected to the side limiting block.

[0014] Furthermore, positioning sleeves are provided on both sides of the top of the support body, and a positioning shaft is fixedly connected to the bottom of the lifting plate, with the positioning shaft movably connected to the positioning sleeve.

[0015] Furthermore, an adjusting cylinder is also provided on one side of the support.

[0016] Furthermore, the top of the support is equipped with four sets of grippers, mounting bases, and clamping cylinders.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] This invention utilizes end-face and bottom-face guide rods for guidance and constraint, facilitating accurate cylinder placement, improving positioning efficiency, and achieving a pre-positioning function. It features a lifting plate and lifting cylinder for convenient cylinder support and movement, ensuring easy operation. Precise positioning is achieved using locating pins, guaranteeing the machining accuracy of subsequent precision milling of the top surface. A clamping cylinder in conjunction with grippers securely fixes the cylinder, preventing displacement during machining. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the talisman stone of this utility model;

[0021] Figure 3 This is a schematic diagram of the internal structure of this utility model.

[0022] The markings in the diagram are: 1-Support body, 2-Mounting seat, 3-Clamping cylinder, 4-Gripper, 5-End face guide rod, 6-End face support block, 7-First guide rod clamping block, 8-Positioning pin, 9-Flush head, 10-Bottom face guide rod, 11-Second guide rod clamping block, 12-Positioning screw, 13-Lifting plate, 14-Side limiting block, 15-Lifting ring, 16-Base plate, 17-Positioning sleeve, 18-Positioning shaft, 19-Lifting cylinder. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example:

[0025] A vertical milling fixture structure for precision milling of the top surface, hereinafter referred to as the fixture structure, includes a support body 1, a pre-positioning mechanism, and a positioning and clamping mechanism. The pre-positioning mechanism includes an end guide rod 5, a lifting plate 13, and a bottom guide rod 10. The positioning and clamping mechanism includes a positioning pin 8, a gripper 4, a mounting base 2, and a clamping cylinder 3. The end guide rod 5 is connected to both sides of the support body 1. The lifting plate 13 is movably connected to the support body 1. A lifting cylinder 19 is connected to the top of the support body 1. The piston rod of the lifting cylinder 19 is connected to the lifting plate 13. The bottom guide rod 10 is connected to the lifting plate 13. The positioning pin 8 is fixed to the top of the support body 1. The mounting base 2 and the clamping cylinder 3 are both fixed to the support body 1. The middle part of the gripper 4 is hinged to the mounting base 2, and the tail end of the gripper 4 is hinged to the piston rod of the clamping cylinder 3.

[0026] The end guide rod 5 and bottom guide rod 10 are used for pre-positioning the cylinder block, and the lifting plate 13 is used to support the cylinder block. The lifting plate 13 moves up and down through the lifting cylinder 19. The positioning pin 8 is used for precise positioning of the cylinder block, and the clamping cylinder 3 is used to control the gripper 4, which is used to fix the cylinder block. Specifically, in use, a lifting device, such as a crane or hoist, is used to lift the engine cylinder block above the fixture structure. The lifting cylinder 19 is used to push the lifting plate 13 upward, and the lifting device places the engine cylinder block on the lifting plate 13. During the placement process, the end guide rod 5 and bottom guide rod 10 provide guidance and restraint, thereby enabling the cylinder block to be placed accurately on the lifting plate 13. Then, the lifting plate 13 is lowered through the lifting cylinder 19. During the lowering process, the position of the cylinder block is observed and manually adjusted to ensure that the hole at the bottom of the cylinder block mates with the positioning pin 8 on the support body 1. After the cylinder body and the positioning pin 8 are configured, the cylinder body is positioned accurately. The clamping cylinder 3 pulls the clamping jaw 4 to fix the cylinder body, and then the top surface of the cylinder body can be precision milled.

[0027] In a preferred embodiment, a base plate 16 is fixedly connected to the bottom of the support body 1, and lifting rings 15 are connected to both sides of the base plate 16. The base plate 16 ensures the stability of the support body 1, while two lifting rings 15 are symmetrically connected to both sides of the base plate 16. When it is necessary to transport, move, or adjust the position of the clamp structure in the production workshop, the operator can easily connect lifting ropes, hooks, and other tools to the lifting rings 15, and easily realize the lifting operation of the entire clamp structure with the help of external lifting equipment, such as overhead cranes or hoists.

[0028] In a preferred embodiment, end face support blocks 6 are fixedly connected to both sides of the top of the support body 1, and a first guide rod clamping block 7 is fixedly connected to the end face support block 6. The end face guide rod 5 clamping block is connected to the first guide rod clamping block 7. The end face support blocks 6 are used for guiding and limiting to prevent the cylinder body from falling off the side of the support body 1. The first guide rod clamping block 7 is provided with a mounting groove, and the end face guide rod 5 is installed in the mounting groove. The design of the first guide rod clamping block 7 facilitates the installation and replacement of the end face guide rod 5.

[0029] In a preferred embodiment, the end face support block 6 is further connected to a plurality of water jet heads 9. Before the precision milling of the top surface of the engine block, when the block is hoisted and placed on the fixture structure, the water jet heads 9 can spray water with a certain pressure to effectively clean the relevant surfaces of the block. After the precision milling process, the water jet heads 9 can also perform a rinsing function to promptly wash away the chips, oil stains, and other processing waste remaining on the surface of the block and the fixture structure. The water jet heads 9 can be connected to a water source through pipes.

[0030] In a preferred embodiment, second guide rod clamps 11 are fixedly connected to the front and rear sides of the lifting plate 13, and the bottom guide rod 10 is connected to the second guide rod clamps 11. Similarly, the second guide rod clamps 11 are provided with mounting grooves, and the bottom guide rod 10 is installed in the mounting grooves. The design of the second guide rods facilitates the installation and replacement of the bottom guide rod 10.

[0031] In a preferred embodiment, a side limiting block 14 is fixedly connected to the rear top of the lifting plate 13, and a positioning screw 12 is connected to the side limiting block 14. During the process of placing the engine block onto the lifting plate 13 using a lifting device, the side limiting block 14, in conjunction with the positioning screw 12, can limit the cylinder block in the lateral direction. When the cylinder block is placed on the lifting plate 13 along the guidance of the end face guide rod 5 and the bottom face guide rod 10, the side limiting block 14 limits the range in which the cylinder block can be placed from the side, preventing excessive lateral displacement of the cylinder block on the horizontal plane. The positioning screw 12 can further fine-tune the accuracy of the lateral limiting, so that the cylinder block can be restricted to a suitable position in the lateral direction.

[0032] In a preferred embodiment, positioning sleeves 17 are provided on both sides of the top of the support body 1, and a positioning shaft 18 is fixedly connected to the bottom of the lifting plate 13, with the positioning shaft 18 movably connected to the positioning sleeves 17. During the up-and-down movement of the lifting plate 13 via the lifting cylinder 19, the movable connection between the positioning shaft 18 and the positioning sleeves 17 serves a guiding function. When the lifting cylinder 19 pushes or pulls the lifting plate 13, the positioning shaft 18 moves up and down in a predetermined direction within the positioning sleeves 17, ensuring the stability of the engine block placed on the lifting plate 13 during its up-and-down movement.

[0033] In a preferred embodiment, an adjusting cylinder is also provided on one side of the support body 1. The adjusting cylinder can finely adjust the position of the engine block by the extension and retraction of the piston rod, ensuring the accurate positioning of the engine block during the precision milling of the top surface and improving machining accuracy.

[0034] In a preferred embodiment, the top of the support body 1 is provided with four sets of grippers 4, mounting bases 2, and clamping cylinders 3. The four sets of grippers 4, mounting bases 2, and clamping cylinders 3 work together to clamp and fix the engine block from multiple directions. Compared with a single set or fewer sets, this provides a more uniform and stable clamping force, effectively preventing displacement of the cylinder block during the precision milling of the top surface, ensuring machining accuracy, and ensuring the smooth progress of the process.

[0035] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A vertical face-milling top surface jig structure, characterized by: It comprises a support body (1), a pre-positioning mechanism and a positioning clamping mechanism. The pre-positioning mechanism comprises an end face guide rod (5), a lifting plate (13) and a bottom face guide rod (10), and the positioning clamping mechanism comprises a positioning pin (8), a clamping jaw (4), a mounting seat (2) and a clamping cylinder (3). The end face guide rod (5) is connected to the two sides of the support body (1), the lifting plate (13) is movably connected to the support body (1), the support body (1) is connected with a lifting cylinder (19) at the top, the piston rod of the lifting cylinder (19) is connected to the lifting plate (13), and the bottom face guide rod (10) is connected to the lifting plate (13).

2. A vertical superfinishing face milling fixture structure according to claim 1, wherein: The bottom of the support body (1) is fixedly connected with a bottom plate (16), and the two sides of the bottom plate (16) are connected with lifting rings (15).

3. The fixture structure for finish milling of the top surface of a step according to claim 1, wherein: The two sides of the top of the support body (1) are fixedly connected with end face support blocks (6), the end face support blocks (6) are fixedly connected with first guide rod clamping blocks (7), and the end face guide rod clamping blocks are connected to the first guide rod clamping blocks (7).

4. The fixture structure for finish milling of the top surface of a step according to claim 1, wherein: The end face support blocks (6) are also connected with a plurality of water jet heads (9).

5. The fixture structure for finish milling of the top surface of a step according to claim 1, wherein: The front and rear sides of the lifting plate (13) are fixedly connected with second guide rod clamping blocks (11), and the bottom face guide rod (10) is connected to the second guide rod clamping blocks (11).

6. The fixture structure for precision face milling of a tenon according to claim 1, wherein: The top rear side of the lifting plate (13) is fixedly connected with a side limiting block (14), and the side limiting block (14) is connected with a positioning screw (12).

7. The fixture structure for precision face milling of a tenon according to claim 1, wherein: The top of the support body (1) is provided with positioning sleeves (17), the bottom of the lifting plate (13) is fixedly connected with a positioning shaft (18), and the positioning shaft (18) is movably connected to the positioning sleeves (17).

8. The fixture structure for precision face milling of a tenon according to claim 1, wherein: One side of the support body (1) is also provided with an adjusting cylinder.

9. The fixture structure for precision face milling of a tenon according to claim 1, wherein: The top of the support body (1) is provided with four sets of clamping jaws (4), mounting seats (2) and clamping cylinders (3).

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