Milling side face machining clamp

Abstract

The utility model relates to the technical field of engine cylinder body machining, in particular to a side face milling machining clamp which comprises a base, a positioning column, an extrusion rod, a bull eye wheel and a fixing assembly. The positioning columns are installed at the top end of the base, and the at least two positioning columns are used for being inserted into a workpiece to support and limit the workpiece in the using state. When the engine cylinder block is hoisted and placed through the bull eye wheel, a cylinder sleeve hole in the engine cylinder block and the positioning column are coaxially placed, and the extrusion rod moves towards the inner side of the positioning column and extrudes the fixing assembly, so that the fixing assembly moves towards the outer side of the positioning column with pressure, and the engine cylinder block is fixed through the bull eye wheel. The positioning column is arranged in the cylinder sleeve hole and makes contact with the inner wall of the cylinder sleeve hole in the engine cylinder body to generate pressure, so that the engine cylinder body is fixed to the positioning column through the fixing assembly making contact with the inner wall of the cylinder sleeve hole, and the engine cylinder body is fixed conveniently and stably.

Description

Technical Field

[0001] The utility model relates to the technical field of engine cylinder block processing, and particularly relates to a milling side processing fixture. Background Technique

[0002] The engine is composed of two major parts, the cylinder block and the cylinder head, which are connected to each other by bolts. The cylinder block material should have sufficient strength, good castability and machinability, and the price should be low. Therefore, the commonly used cylinder block materials are cast iron and alloy cast iron. During the processing of the engine cylinder block, side milling is required.

[0003] In the prior art, the Chinese patent document with the publication number CN219818901U discloses a milling side processing fixture for an engine cylinder block. For this milling side processing fixture of the engine cylinder block, the cylinder sleeve holes on the engine cylinder block are aligned with the positioning columns, then the engine cylinder block is placed on the base, and then the pressing plate is reinstalled on the positioning columns. By using the rolling of the balls, the friction between the pressing plate and the engine cylinder block is reduced during the rotation of the pressing plate. Then, by rotating the rotating rod, through the rotation of the threaded rod and the limitation of the limiting rod, the clamping plate can move inward, and the clamping block on the clamping plate is used to cooperate with the end face holes of the engine cylinder block. At the same time, by using the clamping and fixing of the clamping plate, the stability of the engine cylinder block on the base can be enhanced.

[0004] However, when the above-mentioned milling side processing fixture for the engine cylinder block is in use, due to the heavy weight of the engine cylinder block, only the force of the spring does not ensure that the cylinder sleeve holes on the engine cylinder block are coaxially placed with the positioning columns. At the same time, pressing is performed at both ends and the top, while the two sides of the engine cylinder block are not fixed. Moreover, the processing accuracy of the engine is relatively high, the milling processing equipment is program-controlled, and there is a large acting force between the milling processing equipment and the engine cylinder block during processing. Therefore, during processing, the milling processing equipment will most forcefully drive the engine cylinder block to displace, causing the inner wall of the cylinder sleeve hole on the engine cylinder block to drive the spring to compress, resulting in poor processing accuracy of the engine cylinder block. Summary of the Utility Model

[0005] The purpose of the utility model is to propose a milling side processing fixture aiming at the problems existing in the background technique.

[0006] The technical solution of the utility model: A milling side processing fixture includes a base, positioning columns, extrusion rods, bull's-eye wheels and fixing components;

[0007] The positioning columns are installed at the top of the base. The number of the positioning columns is at least two and is used for being inserted into the workpiece in the use state to support and limit the workpiece;

[0008] The extrusion rods are inserted into the inner sides of the tops of the positioning columns and are in contact with the fixing pieces for moving the fixing pieces outward from the positioning columns to fix the workpiece in the use state;

[0009] The bull's-eye wheel is installed on the outer side wall of the top end of the positioning post and is used to contact the inner side wall of the workpiece and limit it in the use state;

[0010] The fixing component is installed inside the top end of the positioning post and penetrates through the positioning post and extends to the outside of the positioning post, and is used to move to the outside of the positioning post to fix the workpiece in the use state.

[0011] Preferably, the positioning post includes a bottom plate and a positioning cylinder;

[0012] The bottom plate is installed on the upper end face of the base through bolts;

[0013] The positioning cylinder is installed in the middle of the upper end face of the bottom plate, and has internal threads on its inner side.

[0014] Preferably, a guiding ring is installed on the outer side of the top end of the positioning cylinder, and the outer diameter value of the guiding ring gradually increases from the upper end face of the positioning cylinder towards the bottom plate along the height direction of the positioning cylinder.

[0015] Preferably, an installation groove with interrupted internal threads is arranged on the inner side of the positioning cylinder, and the top end of the installation groove is through.

[0016] Preferably, one end of the bull's-eye wheel has a screw rod, and the other end has a roller. A threaded hole is formed on the outer side wall of the positioning post. When the bull's-eye wheel is installed in cooperation with the positioning post, the screw rod of the bull's-eye wheel is accommodated in the threaded hole of the positioning post.

[0017] Preferably, the extrusion rod includes an extrusion rod body, a guiding groove and a rotating block;

[0018] The extrusion rod body is inserted inside the positioning post and is threadedly connected to the positioning post;

[0019] The rotating block is arranged at the end of the extrusion rod body, and its shape is hexagonal, and a hexagonal groove is formed on the end face for installing the extrusion rod body inside the positioning post in the use state;

[0020] The guiding groove is arranged on the outer side of the extrusion rod body for contacting the fixing component in the use state.

[0021] Preferably, a placement groove is arranged on the outer side of the extrusion rod body and below the guiding groove, and the placement groove is communicated with the guiding groove for placing the end of the fixing component in the use state.

[0022] Preferably, the fixing component includes a connecting rod, a spring and a connecting block;

[0023] The connecting rod is arranged inside the positioning post, one end penetrates through the positioning post and extends to the outside of the positioning post, the other end is rectangular, and an inclined surface is formed at the top end of the other end;

[0024] The spring is arranged inside the positioning column and sleeved on the outer side of one end of the connecting rod for resetting the connecting rod after use;

[0025] The connecting block is threadedly connected to one end of the connecting rod.

[0026] Preferably, the outer side of the connecting block is wrapped with a protective sleeve, and the protective sleeve is made of a soft material.

[0027] Compared with the prior art, the above technical solution of the present utility model has the following beneficial technical effects:

[0028] In the present utility model, during the hoisting and placing process of the engine cylinder block by the bull's-eye wheel, the cylinder sleeve hole on the engine cylinder block is coaxially placed with the positioning column, and by moving the extrusion rod towards the inside of the positioning column and squeezing the fixing component, the fixing component moves towards the outside of the positioning column under pressure and contacts the inner wall of the cylinder sleeve hole on the engine cylinder block to generate pressure, so that the engine cylinder block is fixed on the positioning column through the fixing component in contact with the inner wall of the cylinder sleeve hole, making the fixing of the engine cylinder block convenient and relatively stable. Description of the Drawings

[0029] Figure 1 It is a perspective view of an embodiment proposed by the present utility model.

[0030] Figure 2 It is an enlarged schematic view of the positioning column of the present utility model.

[0031] Figure 3 It is a schematic view of the internal structure of the positioning column of the present utility model.

[0032] Figure 4 It is a schematic view of the connection between the positioning column and the extrusion rod of the present utility model.

[0033] Figure 5 It is an exploded schematic view of the fixing component of the present utility model.

[0034] Figure 6 It is a schematic view of the structure of the positioning column of the present utility model.

[0035] Figure 7 It is a sectional schematic view of the structure of the extrusion rod of the present utility model.

[0036] Figure 8 It is a schematic view of the connection structure between the bull's-eye wheel and the positioning column of the present utility model.

[0037] Reference Signs: 1, base; 2, positioning column; 21, bottom plate; 22, positioning cylinder; 23, guide ring; 24, installation groove; 3, extrusion rod; 31, extrusion rod body; 32, guide groove; 33, placement groove; 34, rotating block; 4, bull's-eye wheel; 5, fixing component; 51, connecting rod; 52, spring; 53, connecting block; 54, protective sleeve. Specific Embodiments

[0038] Embodiment 1

[0039] As Figure 1-8 shown, a side milling fixture proposed by the present utility model includes a base 1, positioning columns 2, extrusion rods 3, bull's eye wheels 4 and fixing components 5;

[0040] The positioning columns 2 are installed at the top end of the base 1. The number of the positioning columns 2 is at least two and is used for being inserted into a workpiece in a use state to support and limit the workpiece;

[0041] The extrusion rods 3 are inserted into the inner sides of the tops of the positioning columns 2 and contact with the fixing parts, and are used for moving the fixing parts outward of the positioning columns 2 in a use state to fix the workpiece.

[0042] The bull's eye wheels 4 are installed on the outer side walls of the tops of the positioning columns 2 and are used for contacting with the inner side walls of the workpiece in a use state and limiting the workpiece; there are multiple groups of bull's eye wheels 4, and each group has multiple bull's eye wheels 4. It should be noted that one end of the bull's eye wheel 4 has a screw rod, and the other end has a roller. Threaded holes are formed on the outer side walls of the positioning columns 2. When the bull's eye wheels 4 are installed in cooperation with the positioning columns 2, the screw rods of the bull's eye wheels 4 are accommodated in the threaded holes of the positioning columns 2.

[0043] The fixing components 5 are installed on the inner sides of the tops of the positioning columns 2 and penetrate through the positioning columns 2 and extend to the outer sides of the positioning columns 2, and are used for moving outward of the positioning columns 2 in a use state to fix the workpiece; there are multiple groups of fixing components 5, and each group has multiple fixing components 5.

[0044] In this embodiment, by hoisting the engine cylinder block above the positioning columns 2 and slowly moving and placing it, the cylinder sleeve holes on the engine cylinder block are sleeved and moved outward of the positioning columns 2. During the continuous falling process, the balls of the multiple bull's eye wheels 4 are in contact with and roll on the inner wall of the cylinder sleeve holes on the engine cylinder block, so that the position of the engine cylinder block is adjusted during the falling process. The cylinder sleeve holes on the engine cylinder block are coaxially arranged with the centers of the positioning columns 2, and the engine cylinder block is placed on the positioning columns 2. A tool is used to rotate the extrusion rods 3 inside the positioning columns 2, so that the extrusion rods 3 move downward inside the positioning columns 2. At the same time, the extrusion rods 3 drive the multiple fixing components 5 to extend outward of the positioning columns 2 at the same time, so that the multiple fixing components 5 are in contact with and generate extrusion on the inner wall of the cylinder sleeve holes on the engine cylinder block at the same time, and the engine cylinder block is fixed on the outer sides of the positioning columns 2, making it convenient to fix the engine cylinder block and avoiding the situation that the fixture affects the milling process of the engine cylinder block.

[0045] Embodiment 2

[0046] As Figure 6As shown, a side milling processing fixture proposed by the present utility model. Compared with Embodiment 1, in this embodiment, the positioning post 2 includes a base plate 21 and a positioning cylinder 22;

[0047] The base plate 21 is installed on the upper end surface of the base 1 through bolts, enabling the fixture to be replaced. Engine blocks of different sizes are placed on the positioning post 2 for fixation;

[0048] The positioning cylinder 22 is installed in the middle of the upper end surface of the base plate 21. It has internal threads inside, and is connected to the extrusion rod 3 through the internal threads, so that the extrusion rod 3 has resistance to moving up and down when installed in the positioning post 2.

[0049] In an optional embodiment, a guiding ring 23 is installed on the outer side of the top end of the positioning cylinder 22. Among them, the outer diameter value of the guiding ring 23 gradually increases from the upper end surface of the positioning cylinder 22 towards the base plate 21 along the height direction of the positioning cylinder 22. The guiding ring 23 can move during the hoisting process to adjust its position.

[0050] In an optional embodiment, an installation groove 24 with discontinuous internal threads is provided inside the positioning cylinder 22. The top end of the installation groove 24 is through-shaped. Among them, the fixing component 5 is located inside the installation groove 24 and extends to the outside of the positioning post 2.

[0051] Embodiment 3

[0052] As Figure 7 shown, a side milling processing fixture proposed by the present utility model. Compared with Embodiment 1, in this embodiment, the extrusion rod 3 includes an extrusion rod body 31, a guiding groove 32 and a rotating block 34;

[0053] The extrusion rod body 31 is inserted inside the positioning post 2 and is threadedly connected to the positioning post 2 for moving the extrusion rod body 31 towards the inside of the positioning post 2 under the condition of having a linear reset block in the use state;

[0054] The rotating block 34 is arranged at the end of the extrusion rod body 31. Its shape is hexagonal, and a hexagonal groove is provided on the end face for installing the extrusion rod body 31 inside the positioning post 2 in the use state. Its shape is adapted to the sizes of tools such as wrenches;

[0055] The guiding groove 32 is arranged on the outer side of the extrusion rod body 31 for contacting the fixing component 5 and guiding the fixing component 5 to move horizontally in the use state.

[0056] In an alternative embodiment, a placement groove 33 is provided on the outer side of the extrusion rod body 31 and below the guiding groove 32. The placement groove 33 communicates with the guiding groove 32 for placing the end portion of the fixing component 5 in the use state. When the positioning column 2 is inserted into the cylinder sleeve hole on the engine block, the connecting rod 51 extends inwardly toward the positioning column 2 through the spring 52.

[0057] Embodiment Four

[0058] As Figure 1-Figure 2 and Figure 5 shown, a side milling fixture proposed by the present utility model. Compared with Embodiment One, in this embodiment, the fixing component 5 includes a connecting rod 51, a spring 52, and a connecting block 53;

[0059] The connecting rod 51 is arranged inside the positioning column 2, one end penetrates through the positioning column 2 and extends to the outside of the positioning column 2, the other end is rectangular, and there is an inclined surface at the top end of the other end. In the use state, the inclined surface contacts the guiding groove 32 for guiding, and generates a lateral movement force by contacting the end surface with the extrusion rod 3;

[0060] The spring 52 is arranged inside the positioning column 2 and sleeved on the outer side of one end of the connecting rod 51 for resetting the connecting rod 51 after use, so that the fixing component 5 continuously fixes the engine block to be machined;

[0061] The connecting block 53 is threadedly connected to one end of the connecting rod 51 for first installing the connecting rod 51 and the spring 52 on the positioning column 2 in the use state, and installing the connecting block 53 on the outside of the positioning column 2, avoiding the situation where the connecting rod 51 and the connecting block 53 are integrated and cannot be installed.

[0062] In an alternative embodiment, a protective sleeve 54 is wrapped around the outer side of the connecting block 53. The protective sleeve 54 is made of a soft material for separating the connecting block 53 from the inner wall of the cylinder sleeve hole on the engine block during use, avoiding the inner wall of the cylinder sleeve hole of the engine block from being indented due to the connecting rod 51 receiving pressure and driving the connecting block 53 to squeeze.

[0063] In summary, when the utility model is in use, the engine block is hoisted above the positioning column 2. Usually, tools such as a crane and a sling are used for hoisting. Therefore, the engine block can be moved during the hoisting process. When it is slowly moved and placed, the cylinder sleeve hole on the engine block is sleeved and moved outward of the positioning cylinder 22. At the same time, through the guiding of the guiding ring 23, it is avoided that the engine block directly touches the upper part of the bull's-eye wheel 4. During the continuous falling process, since the balls of the bull's-eye wheel 4 contact and roll with the inner wall of the cylinder sleeve hole on the engine block, the position of the engine block is adjusted during the falling process, so that the balls of multiple bull's-eye wheels 4 all contact the inner wall of the cylinder sleeve hole on the engine block, and the cylinder sleeve hole on the engine block is coaxially arranged with the center of the positioning column 2. Then the engine block is placed above the bottom plate 21. A tool is used to connect with the rotating block 34, and the extrusion rod body 31 is rotated inside the positioning cylinder 22, so that the extrusion rod body 31 moves towards the inner bottom end of the positioning cylinder 22 through the thread of the positioning cylinder 22. The guiding groove 32 contacts the inclined surface of the connecting rod 51 inside the placing groove 33. During the continuous downward movement, the inclined surface of the connecting rod 51 separates from the guiding groove 32, and the outer side of the extrusion rod body 31 contacts the end surface of the connecting rod 51, squeezing the connecting rod 51 towards the inside of the installation groove 24, so that one end of the connecting rod 51 drives the connecting block 53 to move towards the engine block. Since the fixing assembly 5 has multiple ones and is arranged at equal angles around the positioning column 2, multiple connecting blocks 53 contact the inner wall of the cylinder sleeve hole on the engine block at the same time, so that the engine block is fixed on the positioning column 2 by contacting the inner wall of the cylinder sleeve hole through the fixing assembly 5. At the same time, the connecting block 53 is wrapped by the protective sleeve 54 so that there is a gap between the connecting block 53 and the engine block, which can avoid indentations on the inner wall of the cylinder sleeve hole of the engine block, making it convenient to fix the engine block and avoiding the influence of the fixture on the milling process of the engine block.

[0064] The above has described in detail the embodiments of the present utility model in conjunction with the accompanying drawings. However, the present utility model is not limited to this. Within the scope of knowledge possessed by those skilled in the art to which it pertains, various changes can be made without departing from the gist of the present utility model.

Claims

1. A side milling fixture, characterized in that: It comprises a base (1), a positioning column (2), an extrusion rod (3), a bull's eye wheel (4) and a fixing assembly (5); The positioning column (2) is installed on the top of the base (1), and the number of the positioning column (2) is at least two, and is used to be inserted into the workpiece to support and limit the workpiece when in use; The extrusion rod (3) is inserted into the inner side of the top end of the positioning column (2) and contacts the fixing piece so as to move the fixing piece toward the outer side of the positioning column (2) to fix the workpiece in a use state; The bull's eye wheel (4) is mounted on the outer side wall of the top end of the positioning column (2) and is used to contact the inner side wall of the workpiece and limit the position thereof when in use; The fixing assembly (5) is installed on the inner side of the top end of the positioning column (2) and penetrates the positioning column (2) and extends to the outer side of the positioning column (2), and is used to move toward the outer side of the positioning column (2) to fix the workpiece when in use.

2. A side milling fixture according to claim 1, characterized in that: The positioning column (2) comprises a base plate (21) and a positioning cylinder (22); The bottom plate (21) is mounted on the upper end surface of the base (1) by means of bolts; The positioning tube (22) is installed at the middle part of the upper end surface of the bottom plate (21), and has an internal thread on the inner side thereof.

3. A side milling fixture according to claim 2, characterized in that: A guide ring (23) is installed on the outer side of the top end of the positioning cylinder (22), and the outer diameter of the guide ring (23) gradually increases from the upper end surface of the positioning cylinder (22) toward the bottom plate (21) along the height direction of the positioning cylinder (22).

4. A side milling fixture according to claim 2, characterized in that: The inner side of the positioning tube (22) is provided with a mounting groove (24) with disconnected internal threads, and the top end of the mounting groove (24) is through-shaped.

5. The side milling fixture according to claim 1, characterized in that: One end of the bull's eye wheel (4) has a screw rod and the other end has a roller. The outer wall of the positioning column (2) is provided with a threaded hole. When the bull's eye wheel (4) and the positioning column (2) are installed in cooperation, the screw rod of the bull's eye wheel (4) is accommodated in the threaded hole of the positioning column (2).

6. The side milling fixture according to claim 1, characterized in that: The extrusion rod (3) comprises an extrusion rod body (31), a guide groove (32) and a rotating block (34); The extrusion rod body (31) is inserted into the inner side of the positioning column (2) and is threadedly connected to the positioning column (2); The rotating block (34) is arranged at the end of the extrusion rod body (31), and is hexagonal in shape, and has a hexagonal groove on the end surface for mounting the extrusion rod body (31) to the inner side of the positioning column (2) in a use state; The guide groove (32) is arranged on the outer side of the extrusion rod body (31) for contacting with the fixing assembly (5) in a use state.

7. A side milling fixture according to claim 6, characterized in that: A placement groove (33) is provided on the outer side of the extrusion rod body (31) and below the guide groove (32); the placement groove (33) is connected to the guide groove (32) and is used to place the end of the fixing assembly (5) in a use state.

8. The side milling fixture according to claim 1, characterized in that: The fixing assembly (5) comprises a connecting rod (51), a spring (52) and a connecting block (53); The connecting rod (51) is arranged on the inner side of the positioning column (2), one end of which passes through the positioning column (2) and extends to the outer side of the positioning column (2), and the other end is rectangular, and the top end of the other end has an inclined surface; The spring (52) is arranged on the inner side of the positioning column (2) and sleeved on the outer side of one end of the connecting rod (51) for resetting the connecting rod (51) after use; The connecting block (53) is threadedly connected to one end of the connecting rod (51).

9. The side milling fixture according to claim 8, characterized in that: The outer side of the connection block (53) is wrapped with a protective sleeve (54), and the protective sleeve (54) is made of soft material.

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