Lathe workpiece clamping and positioning device

Abstract

A workpiece clamping and positioning device of a lathe is used for solving the technical problems that a workpiece clamping device in the prior art directly pushes a single-side clamp to abut against a workpiece through an air cylinder, clamping force distribution is possibly uneven, deflection of the workpiece is possibly caused when the workpiece is machined, and product quality is affected. Comprising a base used for containing a workpiece, two symmetrically-distributed mounting blocks are arranged on the base, moving blocks are slidably connected to the two mounting blocks correspondingly, and clamping assemblies used for being matched with the inner wall of the base to clamp the workpiece are arranged on the two moving blocks correspondingly; a first driving assembly used for driving the two moving blocks to move in the mounting block in the length direction of the base is arranged in the base, clamping tables are arranged on the two sides of the base correspondingly, clamping blocks are rotationally arranged on the two clamping tables correspondingly, two through grooves are formed in the base, and the bottoms of the two moving blocks are slidably arranged in the two through grooves correspondingly; and second driving assemblies which are used for driving the clamping blocks to rotate and abut against the workpiece are arranged at the bottoms of the two moving blocks.

Description

Technical Field

[0001] This utility model relates to the field of workpiece clamping technology, specifically to a lathe workpiece clamping and positioning device. Background Technology

[0002] In the machining industry, lathes are among the most widely used pieces of mechanical equipment. A lathe is a machine tool that primarily uses a cutting tool to machine rotating workpieces. Drills, reamers, taps, dies, and knurling tools can also be used on a lathe for corresponding machining operations.

[0003] A workpiece clamping device in the prior art, such as the utility model patent document with authorization announcement number "CN219805616U" and patent name "A bidirectional clamp that is easy to operate", discloses a workpiece clamping device, including a cylinder, which is installed on the lower surface of the processing table. The piston rod on the cylinder is connected to the lower end of the locking block, and the locking block is located on the upper surface of the processing table. The side wall of the locking block is connected to the slider. The slider clamps one end of the workpiece, and the other end of the workpiece is clamped by a fixing device.

[0004] The patent document states that the use of a cylinder to directly push a single-sided clamp against the workpiece may result in uneven distribution of clamping force, which could cause workpiece deflection during processing, leading to reduced processing accuracy and affecting product quality. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of the existing technology by proposing a lathe workpiece clamping and positioning device. This device solves the technical problem mentioned in the background art, where the existing workpiece clamping device directly pushes a single-sided clamp against the workpiece using a cylinder. This may result in uneven clamping force distribution, which could cause workpiece deflection during machining, leading to reduced machining accuracy and affecting product quality.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0007] A lathe workpiece clamping and positioning device includes a base for placing a workpiece, two symmetrically distributed mounting blocks on the base, each mounting block having a slidingly connected movable block, and each movable block having a clamping assembly for clamping the workpiece against the inner wall of the base. The base contains a first driving assembly for driving the two movable blocks to move along the length of the base within the mounting blocks. Clamping platforms are located on both sides of the base, each clamping platform having a rotatable clamping block. Two through slots are formed on the base, and the bottoms of the two movable blocks are slidably disposed within these slots. The bottoms of each movable block have a second driving assembly for driving the clamping blocks to rotate and abut against the workpiece.

[0008] Working principle:

[0009] First, the operator places the workpiece to be clamped on the base. Then, the operator activates the first drive assembly, which pushes two moving blocks away from each other on the corresponding mounting blocks. The side of the two moving blocks closest to the base wall gradually approaches the workpiece, clamping the bottom ends of the workpiece between the inner wall of the base and the moving blocks. When the moving blocks move, their bottoms can move within the through slots, which drives the second clamping assembly. The second clamping assembly clamps the top surface of the workpiece, thus firmly clamping the workpiece on the base.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] First, it is equipped with mounting blocks and moving blocks. With two mounting blocks and two moving blocks symmetrically arranged, the two moving blocks can be synchronously clamped in both directions when the first drive component drives the two moving blocks, thereby completing the positioning and clamping operation of the workpiece.

[0012] Secondly, a second driving component is provided. When the moving block approaches the workpiece, it can synchronously drive the second driving component. The second driving component can synchronously drive the clamping block to rotate and make the clamping block abut against the top surface of the workpiece, thereby forming multi-dimensional synchronous clamping and further improving the stability of workpiece clamping. Attached Figure Description

[0013] Figure 1 This is a cross-sectional structural diagram of an embodiment of the present utility model;

[0014] Figure 2 for Figure 1 An enlarged structural diagram of the structure at point A in the middle;

[0015] Figure 3 This is a cross-sectional view of the clamping platform and clamping block.

[0016] Figure 4 This is a cross-sectional view of the movable rod.

[0017] Explanation of reference numerals in the attached drawings: Base 1, Mounting block 2, Moving block 3, Clamping platform 4, Clamping block 5, Through groove 6, First guide rod 7, Abutment plate 8, First spring 9, Cylinder 10, Connecting rod 11, Second guide rod 12, Second spring 13, Fixing block 14, Connecting block 15, Moving rod 16, Push rod 17, Push block 18, Abutment groove 19. Detailed Implementation

[0018] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0019] Example:

[0020] like Figure 1 As shown, a lathe workpiece clamping and positioning device includes a base 1 for placing the workpiece. The workpiece to be processed is shaped like a dome and its bottom ends need to be clamped. The base 1 is provided with two symmetrically distributed mounting blocks 2. Each mounting block 2 is slidably connected to a moving block 3. Each mounting block 2 has a through groove, and the length direction of the groove is parallel to the length direction of the base 1. The mounting blocks 2 can constrain the movement trajectory of the moving blocks 3 to form a stable clamping frame.

[0021] like Figure 1 and Figure 2 As shown, each of the two movable blocks 3 is equipped with a clamping assembly for clamping the workpiece against the inner wall of the base 1. The clamping assembly includes two first guide rods 7, an abutment plate 8, and two first springs 9. The two first guide rods 7 are slidably connected to the movable block 3, the abutment plate 8 is fixedly mounted on the two first guide rods 7, and the two springs are respectively sleeved on the two first guide rods 7, with both ends of the springs fixedly connected to the movable block 3 and the abutment plate 8. The movable block 3 forms an elastic clamping structure with the abutment plate 8 through the first guide rods 7 and the first springs 9. The first springs 9 provide preload force, so that the abutment plate 8 adaptively adjusts the compression amount when contacting the workpiece.

[0022] like Figure 1 As shown, the base 1 is provided with a first driving assembly for driving two moving blocks 3 to move along the length of the base 1 within the mounting block 2. The first driving assembly includes a cylinder 10 and two connecting rods 11. The cylinder 10 is fixed on the base 1, and the two connecting rods 11 are rotatably connected to the telescopic end of the cylinder 10. The ends of the two connecting rods 11 away from the cylinder 10 are rotatably connected to the ends of the corresponding two moving blocks 3. When the telescopic end of the cylinder 10 extends, it can synchronously drive the two connecting rods 11. The two connecting rods 11 synchronously drive the two moving blocks 3 to move synchronously on the two mounting blocks 2, so that the two moving blocks 3 can synchronously approach the workpiece to complete the positioning, centering and clamping of the workpiece.

[0023] like Figure 1 As shown, both mounting blocks 2 are equipped with compensation components for the movable block 3 to retract from the mounting block 2. The compensation components include two second guide rods 12 and two second springs 13. The two second guide rods 12 are fixed on the mounting block 2. The two sides of the movable block 3 are slidably connected to the two second guide rods 12 respectively. The two second springs 13 are respectively sleeved on the two second guide rods 12, and the two ends of the second springs 13 are fixed to the mounting block 2 and the movable block 3 respectively. The second guide rods 12 and the second springs 13 constitute the elastic retraction mechanism of the movable block 3. When the extension end of the cylinder 10 extends outward to push the two movable blocks 3, the second springs 13 change from the natural state to the compressed state. When the extension end of the cylinder 10 retracts, the second springs 13 can release the pushing force, which facilitates the movable block 3 to retract from the mounting block 2.

[0024] like Figure 1 and Figure 3 and Figure 4 As shown, clamping platforms 4 are provided on both sides of the base 1. Clamping blocks 5 are rotatably mounted on both clamping platforms 4. Fixing blocks 14 are fixed on both clamping platforms 4. Connecting blocks 15 are rotatably connected to both fixing blocks 14. The two connecting blocks 15 are rotatably connected to the two clamping blocks 5 respectively. Moving rods 16 are slidably mounted on both clamping platforms 4. The ends of the two moving rods 16 are rotatably connected to the corresponding clamping blocks 5. Two second driving components are used to drive the corresponding two moving rods 16 to move vertically. The clamping blocks 5 form a rotating pair with the moving rods 16 through the fixing blocks 14, connecting blocks 15, and fixing blocks 14. The push rod 17 slides along the through groove 6 at the bottom of the moving block 3. The horizontal thrust is converted into vertical displacement through the inclined abutment groove 19, driving the clamping blocks 5 to rotate around the axis on the fixing blocks 14 to clamp the end face of the workpiece.

[0025] like Figure 1 and Figure 3 and Figure 4 As shown, the base 1 has two through slots 6. The bottoms of the two moving blocks 3 are slidably disposed in the two through slots 6. The bottoms of the two moving blocks 3 are provided with a second driving assembly for driving the clamping block 5 to rotate and abut against the workpiece. The second driving assembly includes a push rod 17 and a push block 18. The push rod 17 is fixed to the bottom of the moving block 3 and slides through the clamping table 4. The moving rod 16 has an inclined abutment groove 19. The push block 18 is fixed to the push rod 17 and slides in the abutment groove 19 and is used to vertically drive the moving rod 16. When the push rod 17 slides with the moving block 3, the push block 18 enters the inclined abutment groove 19 of the moving rod 16. The horizontal driving force is converted into vertical displacement through the inclined surface, driving the clamping block 5 to complete the axial clamping action.

[0026] Working principle:

[0027] First, the operator places the workpiece on the base 1. Then, the operator starts the cylinder 10. The telescopic end of the cylinder 10 extends and pushes the two connecting rods 11. The two connecting rods 11 drive the two moving blocks 3 on both sides to slide synchronously towards the bottom ends of the workpiece along the length direction of the mounting block 2. When the moving blocks 3 move, the abutting plate 8 on the moving blocks 3 first abuts against the workpiece. The first guide rod 7 guides the abutting plate 8 to move linearly. The first spring 9 generates a flexible clamping force through the pre-tightening force, which adaptively compensates for the end face of the workpiece.

[0028] When the moving block 3 slides along the through groove 6, the push rod 17 at the bottom of the moving block 3 pushes the push block 18 into the inclined abutment groove 19 of the moving rod 16, converting the horizontal thrust into vertical displacement, driving the moving rod 16 to rise vertically on the clamping table 4. Thus, the moving rod 16 can push the clamping block 5. The clamping block 5 can rotate around the axis of the fixed block 14 through the connecting block 15, so that the clamping block 5 can perform a clamping operation on the end face of the workpiece, further improving the stable clamping of the workpiece.

[0029] After processing, cylinder 10 retracts, connecting rod 11 drives moving block 3 to move, second spring 13 pushes moving block 3 to facilitate moving block 3 exiting from mounting block 2, moving block 3 drives pushing block 18 on pushing rod 17 to move in abutment groove 19, thereby moving rod 16 vertically downward, clamping block 5 releases workpiece end face under the action of moving rod 16, abutment plate 8 gradually moves away from workpiece as moving block 3 moves, first spring 9 rebounds to reset, completing workpiece release.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A lathe workpiece clamping and positioning device, characterized by, The system includes a base (1) for placing workpieces, on which two symmetrically distributed mounting blocks (2) are provided. Each of the two mounting blocks (2) is slidably connected to a movable block (3). Each of the two movable blocks (3) is provided with a clamping assembly for clamping the workpiece in cooperation with the inner wall of the base (1). The base (1) is provided with a first driving assembly for driving the two movable blocks (3) to move along the length of the base (1) within the mounting blocks (2). Each side of the base (1) is provided with a clamping platform (4). Each of the two clamping platforms (4) is rotatably provided with a clamping block (5). The base (1) is provided with two through slots (6). The bottoms of the two movable blocks (3) are slidably disposed in the two through slots (6). The bottoms of the two movable blocks (3) are provided with a second driving assembly for driving the clamping block (5) to rotate and abut against the workpiece.

2. A lathe workpiece holding and positioning device according to claim 1, wherein: The clamping assembly includes two first guide rods (7), an abutment plate (8), and two first springs (9). The two first guide rods (7) are slidably connected to the moving block (3). The abutment plate (8) is fixed on the two first guide rods (7). The two springs are respectively sleeved on the two first guide rods (7) and their two ends are respectively fixed to the moving block (3) and the abutment plate (8).

3. A lathe workpiece holding and positioning device according to claim 1 wherein: The first drive assembly includes a cylinder (10) and two connecting rods (11). The cylinder (10) is fixed on the base (1). The two connecting rods (11) are rotatably connected to the telescopic end of the cylinder (10). The ends of the two connecting rods (11) away from the cylinder (10) are rotatably connected to the ends of the corresponding two moving blocks (3).

4. A lathe workpiece holding and positioning device according to claim 3, wherein: Both mounting blocks (2) are provided with compensation components for the moving block (3) to exit from the mounting block (2).

5. A lathe workpiece holding and positioning device according to claim 4 wherein: The compensation component includes two second guide rods (12) and two second springs (13). The two second guide rods (12) are fixed on the mounting block (2). The two sides of the moving block (3) are slidably connected to the two second guide rods (12) respectively. The two second springs (13) are respectively sleeved on the two second guide rods (12) and the two ends of the second springs (13) are fixed to the mounting block (2) and the moving block (3) respectively.

6. A lathe workpiece holding and positioning device according to claim 1 wherein: Each of the two clamping platforms (4) is fixed with a fixing block (14), and each of the two fixing blocks (14) is rotatably connected with a connecting block (15). The two connecting blocks (15) are rotatably connected to the two clamping blocks (5) respectively. Each of the two clamping platforms (4) is slidably provided with a moving rod (16), and the ends of the two moving rods (16) are rotatably connected to the corresponding clamping blocks (5). The two second driving components are used to drive the corresponding two moving rods (16) to move vertically.

7. A lathe workpiece holding and positioning device according to claim 6, wherein: The second driving assembly comprises a pushing rod (17) and a pushing block (18), the pushing rod (17) is fixed on the bottom of the moving block (3) and the pushing rod (17) slides through the clamping table (4), an inclined abutting groove (19) is formed on the moving rod (16), the pushing block (18) is fixed on the pushing rod (17) and the pushing block (18) slides in the abutting groove (19) and is used for vertically driving the moving rod (16).

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