Jacking clamp for lathe cylinder machining

Abstract

The utility model discloses a jacking clamp for lathe cylinder machining, and relates to the technical field of workpiece clamping devices, the jacking clamp comprises a jacking main body, the jacking main body comprises a conical tip part, a jacking screw rod is fixed on the end face of the tip part, and a positioning sleeve is fixed on the outer side of the jacking screw rod; the locking device further comprises a locking main body, the locking main body comprises a locking sleeve in threaded connection with the end, close to the tip part, of the jacking screw rod, the locking sleeve is connected with the jacking screw rod through locking internal threads formed in a penetrating mode, a protruding part is fixed to the periphery of one end of the locking sleeve, and a plurality of counter bores are formed in the protruding part; the extension body comprises an extension rod, one end of the extension rod is provided with an extension internal thread, the other end of the extension rod is provided with an extension external thread, and the extension rod can be in threaded connection with the end, away from the tip part, of the jacking screw through the extension internal thread; the turning problem of various workpieces of which the outer diameters cannot be clamped is solved, and meanwhile, the tip is used as a reference for positioning, so that quick feeding and discharging are realized.

Description

Technical Field

[0001] This utility model relates to the technical field of workpiece clamping devices, specifically to a clamping fixture for machining a lathe column. Background Technology

[0002] In the field of lathe machining, diverse fixtures are needed to hold parts of different shapes, sizes, and machining requirements. This is especially true for the machining of cylindrical parts, where conventional fixtures are insufficient to meet all needs due to their structural characteristics and the specific machining processes. Traditional three-jaw chucks are widely used in lathe machining due to their versatility, but their limitations become apparent when dealing with cylindrical parts with special structures, especially when suitable clamping positions are unavailable.

[0003] Traditional three-jaw chucks cannot provide effective fixation for cylindrical parts without clamping positions, causing displacement of the part during turning due to tool cutting forces. This affects machining accuracy and may even render the part unusable. Furthermore, the fixed structure of traditional chucks makes it difficult to flexibly adjust to different parts' lengths and shapes, resulting in poor versatility. Moreover, some chucks lack convenient adjustment and expansion functions, failing to meet the diverse needs of machining complex parts and hindering improvements in lathe machining efficiency and quality. Utility Model Content

[0004] To address the aforementioned problems, this utility model proposes a clamping fixture for machining a lathe column, comprising a clamping body, which includes a conical tip, a clamping screw fixed to the end face of the tip, and a positioning sleeve fixed to the outer side of the clamping screw; it also includes a locking body, which includes a locking sleeve threadedly connected to the end of the clamping screw near the tip, the locking sleeve being connected to the clamping screw via a through-hole locking internal thread, and a protrusion fixed to the outer periphery of one end of the locking sleeve, the protrusion having multiple countersunk holes; and an extension body, which includes an extension rod, one end of the extension rod having an extension internal thread, and the other end of the extension rod having an extension external thread, the extension rod being threadedly connected to the end of the clamping screw away from the tip via the extension internal thread.

[0005] Furthermore, the axial section apex angle of the tip is 40°, the height of the tip is 25mm, the length of the positioning sleeve is 70mm, the distance between the positioning sleeve and the end face of the tip is 55mm, the distance between the positioning sleeve and the end of the tightening screw away from the tip is 20mm, the diameter of the positioning sleeve is 40mm, and the external thread specification of the tightening screw is M16*1.5.

[0006] Furthermore, the diameter of the locking sleeve is 30mm, the diameter of the protrusion is 40mm, the length of the protrusion is 15mm, the diameter of the countersunk hole in the protrusion is 8mm, the depth of the countersunk hole is 6mm, and the locking internal thread specification of the locking sleeve is M16*1.5.

[0007] Furthermore, the extension rod has a diameter of 40mm, a total length of 120mm, an external thread section of 20mm, an internal thread section of 22mm, and both the external and internal threads are M16*1.5.

[0008] Furthermore, four countersunk holes are set at equal intervals.

[0009] The beneficial effects of this utility model are as follows:

[0010] 1. This clamping fixture uses the center point to engage with the center hole of the part, combined with the clamping force of the three-jaw chuck to effectively fix the part by utilizing the clamping force on both sides. It provides a reliable solution for turning parts with special structures, greatly expanding the range of parts that can be machined on a lathe. The center point is used as a reference for positioning, enabling rapid loading and unloading.

[0011] 2. The locking body features a countersunk hole design on the protruding part. Operators only need to insert common tools such as iron bars into the countersunk hole to tighten and loosen the locking sleeve. Compared with traditional complex clamping methods, the operation is simpler and faster, reducing the labor intensity of operators and improving work efficiency. At the same time, this simple operation method also facilitates quick parts replacement and shortens auxiliary processing time.

[0012] 3. The extended body design allows the fixture to be flexibly adjusted according to the length requirements of different parts. Through the sequential connection of multiple extension rods, it can easily meet the processing needs of cylindrical parts of various lengths, without the need to change to special fixtures for parts of different lengths. This improves the versatility of the fixture and the utilization rate of the equipment, and reduces the fixture procurement and management costs for enterprises. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the clamping body in this utility model;

[0014] Figure 2 This is a schematic diagram of the external structure of the locking body in this utility model;

[0015] Figure 3 This is a schematic diagram of the internal structure of the locking body in this utility model;

[0016] Figure 4 This is a schematic diagram of the cross-sectional structure of the locking body in this utility model;

[0017] Figure 5 This is a schematic diagram of the external structure of the extended main body in this utility model;

[0018] Figure 6This is a schematic diagram of the internal structure of the extended main body in this utility model.

[0019] The reference numerals in the attached drawings are explained as follows: 1. Tightening body; 101. Center point; 102. Tightening screw; 103. Positioning sleeve; 2. Locking body; 201. Locking sleeve; 202. Protrusion; 203. Countersunk hole; 204. Locking internal thread; 3. Extension body; 301. Extension rod; 302. Extension internal thread; 303. Extension external thread. Detailed Implementation

[0020] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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, and therefore should not be construed as a limitation on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] The present invention will be further described below with reference to the accompanying drawings:

[0023] A clamping fixture for machining a lathe column, such as Figure 1 As shown, the device includes a clamping body 1, which includes a conical tip 101. A clamping screw 102 is fixed to the end face of the tip 101, and a positioning sleeve 103 is fixed to the outside of the clamping screw 102. The tip angle of the axial section of the tip 101 is 40°, the height of the tip 101 is 25mm, the length of the positioning sleeve 103 is 70mm, the distance between the positioning sleeve 103 and the end face of the tip 101 is 55mm, the distance between the positioning sleeve 103 and the end of the clamping screw 102 away from the tip 101 is 20mm, the diameter of the positioning sleeve 103 is 40mm, and the external thread specification of the clamping screw 102 is M16*1.5.

[0024] The top part 101 is conical and is used to mate with the center hole of the part for positioning and tightening; the tightening screw 102 serves as a connecting component, providing a carrier for the installation of other components; the positioning sleeve 103 is fixed to the outside of the tightening screw 102 to assist in the positioning of the part. The dimensions and specifications of each component are clearly defined to ensure precise fit.

[0025] like Figure 2 , Figure 3 and Figure 4 As shown, this embodiment also includes a locking body 2. The locking body 2 includes a locking sleeve 201 threadedly connected to one end of the tightening screw 102 near the top tip 101. The locking sleeve 201 is connected to the tightening screw 102 through a through-hole locking internal thread 204. A protrusion 202 is fixed on the outer periphery of one end of the locking sleeve 201. A plurality of countersunk holes 203 (preferably four) are provided on the protrusion 202. The diameter of the locking sleeve 201 is 30mm, the diameter of the protrusion 202 is 40mm, the length of the protrusion 202 is 15mm, the diameter of the countersunk hole 203 of the protrusion 202 is 8mm, the depth of the countersunk hole 203 is 6mm, and the thread specification of the locking internal thread 204 of the locking sleeve 201 is M16*1.5.

[0026] The locking sleeve 201 is connected to the tightening screw 102 by a thread, and the clamping force can be adjusted when rotated; the protrusion 202 and the countersunk hole 203 are designed to facilitate operation with tools and optimize the convenience of operation; the dimensional parameters of each part are specified to ensure structural strength and operational feasibility.

[0027] like Figure 5 and Figure 6 As shown, this embodiment also includes an extension body 3, which includes an extension rod 301. One end of the extension rod 301 has an extension internal thread 302, and the other end of the extension rod 301 has an extension external thread 303. The extension rod 301 can be threadedly connected to the end of the tightening screw 102 away from the top tip 101 through the extension internal thread 302. The extension rod 301 has a diameter of 40mm, a total length of 120mm, a length of 20mm for the extension external thread 303, a length of 22mm for the extension internal thread, and both the extension external thread 303 and the extension internal thread 302 of the extension rod 301 have a thread specification of M16*1.5.

[0028] The extension rod 301 has an internal extension thread 302 and an external extension thread 303 at both ends, which can be connected to the tightening screw 102 and other extension rods 301 to achieve flexible expansion of the fixture length, enhance the versatility of the fixture, eliminate the need to replace the fixture due to differences in part length, and reduce costs; through multi-rod connection, it can be adapted to the processing of cylindrical parts of various lengths, improving equipment utilization and production flexibility.

[0029] The working principle of this utility model is as follows:

[0030] Part positioning and preliminary installation: Before machining the cylindrical part on the lathe, install the clamping fixture in a suitable position on the lathe (e.g., using a three-jaw chuck), so that the center part 101 corresponds to the lathe center seat. Place the cylindrical part to be machined between the clamping fixture and the lathe center seat, with the center hole at one end of the part engaging with the conical surface of the center part 101. The guiding effect of the conical surface is used to achieve preliminary positioning of the part.

[0031] Working process of locking body 2: After the part is initially positioned, it needs to be clamped by locking body 2. The operator uses tools such as iron bars to insert into the countersunk hole 203 of the protrusion 202 of locking sleeve 201, and rotates the protrusion 202 with the countersunk hole 203 as the point of force. Since locking sleeve 201 is connected to tightening screw 102 through locking internal thread 204, during rotation, locking sleeve 201 will move along the thread of tightening screw 102 towards the part. As locking sleeve 201 moves continuously, it gradually presses against the surface of the part, generating a gradually increasing clamping force, thereby firmly fixing the part on the tightening fixture.

[0032] Extension Body 3 Expansion Function: If the length of the cylindrical part to be processed is long and a single extension rod 301 cannot meet the requirements, the expansion function of the extension body 3 can be utilized. Multiple extension rods 301 are connected sequentially through their internal extension threads 302 and external extension threads 303 at both ends. During connection, the external extension thread 303 of one extension rod 301 is screwed into the internal extension thread 302 of another extension rod 301, achieving connection through the tight fit of the threads. As the extension rods 301 are continuously connected, the length of the entire fixture is extended, thus adapting to the processing requirements of cylindrical parts of different lengths. During processing, the extension rods 301 transmit clamping force through the threaded connection, ensuring that the fixture maintains good stability and reliability even after the length is extended.

[0033] After processing is completed, the operator inserts an iron bar into the countersunk hole 203 and rotates the locking sleeve 201 counterclockwise to loosen it, and then the processed part can be removed.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A clamping fixture for machining a lathe column, characterized in that: The system includes a tightening body (1), which includes a conical tip (101) with a tightening screw (102) fixed to the end face of the tip (101) and a positioning sleeve (103) fixed to the outside of the tightening screw (102); it also includes a locking body (2), which includes a locking sleeve (201) threadedly connected to one end of the tightening screw (102) near the tip (101), and the locking sleeve (201) is connected to the tightening screw (102) through a through-hole locking internal thread (204). The locking sleeve (201) has a protrusion (202) fixed on the outer periphery of one end, and a plurality of countersunk holes (203) are provided on the protrusion (202); it also includes an extension body (3), the extension body (3) includes an extension rod (301), one end of the extension rod (301) is provided with an extension internal thread (302), the other end of the extension rod (301) is provided with an extension external thread (303), and the extension rod (301) can be threaded to the end of the tightening screw (102) away from the top point (101) through the extension internal thread (302).

2. The clamping fixture for machining a lathe column according to claim 1, characterized in that: The axial section apex angle of the top part (101) is 40°, the height of the top part (101) is 25mm, the length of the positioning sleeve (103) is 70mm, the distance between the positioning sleeve (103) and the end face of the top part (101) is 55mm, the distance between the positioning sleeve (103) and the end of the tightening screw (102) away from the top part (101) is 20mm, the diameter of the positioning sleeve (103) is 40mm, and the external thread specification of the tightening screw (102) is M16*1.

5.

3. The clamping fixture for machining a lathe column according to claim 1, characterized in that: The locking sleeve (201) has a diameter of 30mm, the protrusion (202) has a diameter of 40mm, the protrusion (202) has a length of 15mm, the countersunk hole (203) of the protrusion (202) has a diameter of 8mm, the countersunk hole (203) has a depth of 6mm, and the locking internal thread (204) of the locking sleeve (201) has a thread specification of M16*1.

5.

4. A clamping fixture for machining a lathe column according to claim 1, characterized in that: The extension rod (301) has a diameter of 40mm, a total length of 120mm, an external thread (303) section of 20mm, an internal thread section of 22mm, and both the external thread (303) and internal thread (302) of the extension rod (301) are M16*1.

5.

5. A clamping fixture for machining a lathe column according to claim 1, characterized in that: The countersunk holes (203) are arranged at equal intervals.

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