Turning positioning clamp

Abstract

The utility model provides a turning positioning clamp which comprises a clamp base, the clamp base is installed on a lathe, the top face of the clamp base is coaxially provided with a supporting protrusion which is concaved inwards to form an open cavity, and non-through installation adjusting open grooves are symmetrically formed in the circumferential surface of the clamp base inwards in the radial direction. The moving block is installed in the installation adjusting open groove in a sliding mode, and an adjusting screw rod with the penetrating end rotationally connected with the clamp base is arranged in the moving block in a penetrating mode; the clamping block is detachably installed on the moving block through a connecting bolt, and a positioning groove is formed in the end face, close to the supporting protrusion, of the clamping block. The clamp base is installed on a lathe, a workpiece to be machined is placed on the supporting protrusion, force is applied to the adjusting screw to drive the moving block and the clamping block to move close to each other along the installation adjusting open groove, and therefore the workpiece to be machined is clamped and fixed. When the lathe rotates, the positioning clamp is driven to rotate synchronously, so that the to-be-machined workpiece fixed by the positioning clamp is turned.

Description

Technical Field

[0001] The utility model relates to the technical field of tooling fixtures, and particularly relates to a turning positioning fixture. Background Art

[0002] With the continuous progress of science and the continuous development of the economy, various precision machining equipment have emerged continuously, and the machining accuracy of machinery is getting higher and higher. A lathe is one of the more common machine tools.

[0003] A lathe usually uses a three-jaw chuck to fix the workpiece to be processed. For shaft and pipe workpieces, it is convenient to fix and simple to operate. However, for a base part with a square block at the bottom, its positioning and fixing operation is relatively troublesome. Therefore, there is an urgent need to provide a turning positioning fixture to solve the above problems. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a turning positioning fixture to solve the problem that it is inconvenient to position and fix a base part with a square block at the bottom by using a three-jaw chuck as mentioned in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A turning positioning fixture, comprising:

[0007] A fixture seat, which is installed on a lathe. A support protrusion with an open cavity formed by being concave inward is coaxially arranged on the top surface of the fixture seat. Installation and adjustment slots that do not penetrate are radially symmetrically opened inward on the circumferential surface of the fixture seat;

[0008] A moving block, which is slidably installed in the installation and adjustment slots. An adjustment screw rod with a penetration end rotatably connected to the fixture seat is penetrated in the moving block;

[0009] A clamping block, which is detachably installed on the moving block through a connecting bolt, and a positioning groove is opened on the end face close to the support protrusion.

[0010] Through the above technical solutions, the fixture seat is installed on the lathe. The workpiece to be processed is placed on the support protrusion. Force is applied to the adjustment screw rod to drive the moving block and the clamping block to move closer along the installation and adjustment slots, so as to clamp and fix the workpiece to be processed; when the lathe rotates, it drives the positioning fixture to rotate synchronously, so as to perform turning operations on the workpiece to be processed fixed by the positioning fixture.

[0011] As another preferred solution of the utility model, the positioning groove is a clamping V-groove, and the included angle between the two walls of the clamping V-groove is a right angle.

[0012] Through the above technical solutions, it is adapted to the square base part of the workpiece to be processed.

[0013] As another preferred solution of the present utility model, the top of the moving block extends out from the top opening of the installation and adjustment slot, the bottom of the moving block is in contact with the inner wall of the bottom of the installation and adjustment slot, and the top of the moving block extending out of the installation and adjustment slot is smaller than its bottom.

[0014] Through the above technical solution, the bottom of the moving block is in contact with the inner wall of the bottom of the installation and adjustment slot, and the top of the moving block extending out of the installation and adjustment slot is smaller than its own bottom, which plays a role in stably limiting the moving block and preventing the moving block from disengaging during operation.

[0015] As another preferred solution of the present utility model, the adjusting screw includes a threaded rod portion and an operating end. One end of the threaded rod portion passing through the fixture base is rotatably connected to the fixture base through a mounting member, and the operating end is provided at the other end of the threaded rod portion.

[0016] Through the above technical solution, the operation convenience of the adjusting screw is improved.

[0017] As another preferred solution of the present utility model, a positioning groove is provided at the bottom of the clamping block. The positioning groove covers the top of the moving block extending out of the installation and adjustment slot, and the connecting bolt passes through the clamping block and is connected to the moving block.

[0018] Through the above technical solution, the connection stability between the moving block and the clamping block is improved.

[0019] As another preferred solution of the present utility model, the support protrusion and the fixture base are integrally designed.

[0020] Through the above technical solution, the accuracy between the fixture base and the support protrusion is improved.

[0021] Compared with the prior art, the beneficial effects of the present utility model are:

[0022] The present utility model provides a turning positioning fixture, including: a fixture base installed on a lathe. A support protrusion with an inner concave opening cavity is coaxially arranged on the top surface of the fixture base. An unpenetrated installation and adjustment slot is radially symmetrically opened inward on the peripheral surface of the fixture base; a moving block slidably installed in the installation and adjustment slot, and an adjusting screw with a penetrating end rotatably connected to the fixture base is arranged in the moving block; a clamping block detachably installed on the moving block through a connecting bolt, and a positioning groove is provided on the end face close to the support protrusion. The fixture base is installed on the lathe, the workpiece to be processed is placed on the support protrusion, and a force is applied to the adjusting screw to drive the moving block and the clamping block to move closer along the installation and adjustment slot, so as to clamp and fix the workpiece to be processed; when the lathe rotates, it drives the positioning fixture to rotate synchronously, so as to perform turning operation on the workpiece to be processed fixed by the positioning fixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is the explosion diagram of the present utility model.

[0024] Figure 2 This is the three-dimensional schematic diagram of the present utility model.

[0025] Figure 3 This is the top view schematic diagram of the present utility model.

[0026] Figure 4 This is the schematic diagram of the present utility model clamping a base part of one specification.

[0027] Figure 5 This is the schematic diagram of the present utility model clamping a base part of another specification.

[0028] In the figure: 1. Fixture base; 11. Support protrusion; 12. Installation and adjustment slot; 2. Moving block; 3. Adjusting screw; 31. Threaded rod part; 32. Operation end; 33. Mounting part; 4. Clamping block; 41. Alignment groove; 42. Clamping V-groove; 5. Connecting bolt. Specific embodiments

[0029] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0030] Please refer to Figures 1-5 , the present utility model provides the following embodiments:

[0031] A turning positioning fixture, please refer to Figure 1 , including: a fixture base 1, a moving block 2 detachably installed on the fixture base 1 through an adjusting screw 3, and a clamping block 4 detachably installed on the moving block 2 through a connecting bolt 5. Specifically, the fixture base 1 is the bottom of the overall fixture and is directly connected to the lathe. The clamping block 4 is fixedly installed on the moving block 2 through the connecting bolt 5, and the moving block 2 is installed on the fixture base 1 through the adjusting screw 3 and drives the clamping block 4 to move in the radial direction of the fixture base 1. By the approach of the clamping block 4 in the radial direction, the two diagonals of the base part of the square block are clamped and restricted.

[0032] Specifically, the fixture base 1 is directly mounted on the lathe and rotates driven by the lathe. A support protrusion 11 with an opening cavity formed by inward depression of the upper surface is provided on the top surface of the fixture base 1. The support protrusion 11 plays a role in raising the workpiece to be machined, so that an avoidance space is formed between the bottom of the workpiece to be machined and the upper surface of the fixture base. Thus, when turning a through hole, the opening cavity and the avoidance space provide a tolerance space for the tool head to prevent the tool from directly contacting the fixture base 1, playing a role in protecting the tool.

[0033] Specifically, the clamping block 4 is mounted on the moving block 2 through a connecting bolt 5 and moves together with the moving block 2 to clamp and fix the workpiece to be machined in direct contact. It should be noted that in this embodiment, the clamping block 4 and the moving block 2 adopt a split structure. On the one hand, it is to reduce the production and processing difficulty of the components, and on the other hand, it is to improve the applicability. By replacing the clamping block 2, the purpose of adapting to workpieces of different specifications and models can be achieved.

[0034] Specifically, a positioning groove adapted to the diagonal of the square base part of the workpiece to be machined is opened on the end face of the clamping block 4 close to the support protrusion 11. Specifically, the positioning groove in this embodiment adopts a clamping V-groove 42, and the included angle between the two walls of the clamping V-groove 42 is a right angle. Combining with the attached Figure 3 , specifically, the right-angled V-shaped groove structure is attached to the side surface of the square block at the bottom of the base part, and the two diagonals of the square block are respectively clamped by two clamping blocks 4. Combining with Figure 4 and Figure 5 , the clamping block 4 provided in this embodiment can match base parts of a certain range of specifications, has a wide application range, and can basically meet the daily processing requirements. It should be noted that the turning hole of the base part should be coaxial with the fixture base 1 during use. Preferably, in this embodiment, the support protrusion 11 and the fixture base 1 are integrated, without the need for assembly connection, ensuring the accuracy requirements. The support protrusion 11 and the fixture base 1 are coaxially designed to play a role in coaxial positioning.

[0035] Specifically, non-through installation and adjustment slots 12 are formed by inward radial depression on the symmetrical peripheral surface of the fixture base 1. The moving block 2 is slidably mounted in the installation and adjustment slots 12. The adjusting screw 3 passes through the moving block 2 and the end inserted into the installation and adjustment slots 12 is rotatably connected to the fixture base 1. The moving block 2 is threadedly connected to the adjusting screw 3. By screwing the adjusting screw 3, the installation and adjustment slots 12 limit the movement path of the moving block 2, so that it can only slide along the installation and adjustment slots 12, realizing the adjustment of the radial distance of the moving block 2 on the fixture base 1. The two adjusting screws 3 are operated separately and can be finely adjusted according to the workpiece.

[0036] Preferably, the top of the moving block 2 extends out from the top opening of the installation and adjustment slots 12, and the bottom of the moving block 2 is in contact with the inner wall of the bottom of the installation and adjustment slots 12. Combining with the attached Figure 1 and 2, specifically, the extended top of the moving block 2 provided in this embodiment is smaller than its own bottom, and the cross-section is in a convex shape. The moving block 2 is stably limited by the installation and adjustment slot 12 and is not easily disengaged. Correspondingly, a positioning groove 41 is provided at the bottom of the clamping block 4, and the positioning groove 41 covers the top of the moving block 2 extending from the installation and adjustment slot 12. Combining Figure 1 and Figure 2 , after the extended top of the moving block 2 is docked with the positioning groove 41, the clamping block 4 can be limited, ensuring the stable effect after connection. The connecting bolt 5 passes through the clamping block 4 and is connected to the moving block 2, and then is fixed through the connecting bolt 5. The installation is stable, ensuring that it is not easy to loosen during the turning process.

[0037] Preferably, the adjusting screw 3 includes a threaded rod portion 31 and an operating end 32. One end of the threaded rod portion 31 passing through the fixture base 1 is rotatably connected to the fixture base 1 through a mounting member 33, and the operating end 32 is provided at the other end of the threaded rod portion 31. Combining Figure 1 , a thread structure adapted to the moving block 2 is provided on the outer wall of the threaded rod portion 31, and the operating end 32 can be docked with tools such as a sleeve, so as to facilitate screwing. The mounting member 33 in this embodiment can be a bearing. A hole for mounting the bearing is provided at the bottom of the installation and adjustment slot 12 along the radial direction of the fixture base 1. First, the adjusting screw 3 and the moving block 2 are assembled, and then the whole is installed on the fixture base 1. The installation is reasonable and the operation is convenient.

[0038] During the turning operation, the fixture is assembled according to the above steps, and then the whole fixture is installed on the fixture base 1. Then, the adjusting screw 3 is appropriately loosened, the workpiece with a square block at the bottom is placed on the supporting protrusion 11, and the two adjusting screws 3 are screwed to drive the moving block 2 and the clamping block 4 to approach each other radially to clamp and fix a pair of diagonals of the square block at the bottom of the base part to be machined. Start the lathe, the lathe drives the fixture to rotate, and the tool works to realize turning processing.

[0039] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A turning positioning fixture, characterized in that: include: A fixture seat (1), the fixture seat (1) being mounted on a lathe, the top surface of the fixture seat (1) being coaxially provided with a supporting protrusion (11) which is concave and has an open cavity, and the peripheral surface of the fixture seat (1) being radially symmetrically provided with non-through installation adjustment slots (12); A moving block (2) is slidably mounted on the mounting adjustment slot (12), and an adjusting screw (3) is inserted into the moving block (2) and is rotatably connected to the clamp seat (1); The clamping block (4) is detachably mounted on the moving block (2) via a connecting bolt (5) and has a positioning groove on its end surface close to the supporting protrusion (11).

2. The turning positioning fixture according to claim 1, characterized in that: The positioning groove is a clamping V-groove (42), and the angle between the two walls of the clamping V-groove (42) is a right angle.

3. The turning positioning fixture according to claim 2, characterized in that: The top of the moving block (2) extends out from the top opening of the installation adjustment slot (12), the bottom of the moving block (2) is in contact with the inner wall of the bottom of the installation adjustment slot (12), and the top of the moving block (2) extending out of the installation adjustment slot (12) is smaller than its bottom.

4. The turning positioning fixture according to claim 3, characterized in that: The adjusting screw (3) comprises a threaded rod (31) and an operating end (32); one end of the threaded rod (31) penetrates into the clamp seat (1) and is rotatably connected to the clamp seat (1) via a mounting member (33); and the operating end (32) is arranged at the other end of the threaded rod (31).

5. The turning positioning fixture according to claim 3, characterized in that: The bottom of the clamping block (4) is provided with an alignment groove (41), the alignment groove (41) covers the top of the moving block (2) extending from the installation adjustment slot (12), and the connecting bolt (5) passes through the clamping block (4) to be connected to the moving block (2).

6. The turning positioning fixture according to claim 1, characterized in that: The supporting protrusion (11) and the clamp seat (1) are designed as an integral unit.

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