Clamping device for machined part of sawing machine

Abstract

The utility model relates to the technical field of sawing machine machining, and discloses a sawing machine machined part clamping device which comprises a base fixed on a workbench, a fixed barrel is arranged above the base, a rotating roller is arranged in the fixed barrel, the rotating roller is located on the horizontal side of the axis of the fixed barrel and is parallel to the axis of the fixed barrel, and the rotating roller is arranged on the base. An opening is formed in the end, opposite to the machining position, of the fixed barrel, a material ejecting mechanism is arranged at the end, away from the machining position, of the fixed barrel, a plurality of positioning grooves are distributed in the outer wall of the rotating roller in the circumferential direction, and the rotating roller is rotationally connected with a support fixed to the base through a rotating shaft; and one end of the rotating shaft is connected with a rotary driving motor fixed on the base. The clamp has the advantages of being simple in structure, convenient to clamp and operate and high in clamping efficiency, the clamping position of a workpiece is integrally wrapped in the positioning groove, the workpiece is not prone to being pressed and deformed, parts cannot be damaged, and the machining quality of the workpiece is better.

Description

Technical Field

[0001] The utility model relates to the technical field of sawing machine processing, in particular to a clamping device for sawing machine workpieces. Background Art

[0002] With the development of modern manufacturing industry towards the direction of high efficiency, high precision and economy, sawing on a sawing machine, as the starting point of precision cutting, has become an important component in the process of part processing. Sawing can save materials, reduce secondary processing amount and improve production efficiency. Therefore, sawing machines, especially automated sawing machines, have been widely used in fields such as steel, machinery, automobiles, shipbuilding, petroleum, mining and aviation.

[0003] A workpiece clamping device must be used on a sawing machine. When processing pipe parts, the situation of not being able to clamp tightly often occurs. Even if it is clamped tightly, after using it for a period of time, loosening will also occur, resulting in poor processing quality.

[0004] The Chinese invention patent with the authorization announcement number of CN204195343U discloses a sawing machine fixture, which includes a workbench, a left bracket and a right bracket arranged on the workbench, a rotating bracket connecting the left bracket and the right bracket, locking devices respectively arranged on the left bracket and the right bracket for fixing the rotating bracket, and a fixing device arranged on the rotating bracket. The fixing device includes a hydraulic cylinder, a hydraulic rod and a pressing block connected in sequence; the pressing block is a rectangular block with a V-shaped groove, and the V-shaped groove is arranged downward; there are two fixing blocks arranged on the workbench, and the shape and size of the fixing blocks are the same as those of the pressing block, and the V-shaped grooves of the fixing blocks are arranged upward; the fixing blocks are respectively arranged on both sides of the pressing block. For this sawing machine fixture of the present invention, when the pressing block moves downward, the pipe falls on the middle position between the two clamping blocks. For tubular parts, the three V-shaped grooves can firmly achieve pressing, so that the loosening situation will not occur.

[0005] However, this kind of fixture is likely to damage the parts due to excessive clamping force when clamping pipe parts, affecting the quality of the parts, and there are certain defects. Content of the Utility Model

[0006] The purpose of the utility model is to provide a clamping device for sawing machine workpieces, which has the advantages of simple structure, convenient clamping operation and high clamping efficiency. Moreover, the clamping position of the workpiece is integrally wrapped in the positioning groove, is not easily deformed under pressure, will not cause damage to the parts, and makes the quality of workpiece processing better.

[0007] The above technical purpose of the utility model is achieved through the following technical solutions:

[0008] A clamping device for a sawing machine workpiece, comprising a base fixed on a workbench. Above the base, there is a fixed cylinder. Inside the fixed cylinder, there is a rotating roller. The rotating roller is located on the horizontal side of the axis of the fixed cylinder and is parallel to the axis of the fixed cylinder. One end of the fixed cylinder opposite to the processing position is an opening. At the end of the fixed cylinder far from the processing position, there is a blank feeding mechanism. A plurality of positioning grooves are circumferentially distributed on the outer wall of the rotating roller. The rotating roller is rotatably connected to a bracket fixed on the base through a rotating shaft. One end of the rotating shaft is connected to a rotating drive motor fixed on the base.

[0009] By adopting the above technical solution, the workpiece blank to be processed is placed in the positioning groove at the top of the rotating roller. Then, the rotating drive motor is started, so that the rotating drive motor drives the rotating roller to rotate. When the rotating roller rotates to the position where the gap between the workpiece blank and the inner wall of the fixed cylinder is the smallest, the workpiece blank is tightly pressed against the positioning groove by the inner wall of the fixed cylinder. Thus, the clamping operation of the workpiece blank is realized. After the workpiece blank is clamped, the part to be sawed off extends from the open end of the fixed cylinder and faces the processing position, so that the sawing machine can complete the processing operation. The part left in the positioning groove after processing is the workpiece. The whole tooling structure is simple, the clamping operation is convenient, the clamping efficiency is high, and the clamping position of the workpiece is integrally wrapped in the positioning groove, not easily deformed by pressure, and will not cause damage to the part, making the quality of workpiece processing better.

[0010] A further setting of the present utility model is that: the cross-section of the positioning groove is semi-circular or V-shaped.

[0011] By adopting the above technical solution, both the semi-circular and V-shaped positioning grooves can well adapt to the clamping and positioning of pipe-shaped workpieces, so that the pipe-shaped workpieces will not move or loosen randomly after being clamped and fixed, thus effectively ensuring the clamping effect of the workpieces.

[0012] A further setting of the present utility model is that: the cross-section of the positioning groove is semi-circular.

[0013] By adopting the above technical solution, the positioning groove with a semi-circular cross-section fits better with the outer circle of the pipe-shaped workpiece. Therefore, after the workpiece blank is clamped, the contact area with the positioning groove is larger. On the one hand, while ensuring a better clamping effect on the pipe-shaped workpiece, the clamping extrusion force on the pipe-shaped workpiece can be dispersed, thus further reducing the situation of excessive local pressure on the workpiece and deformation. On the other hand, it also makes the friction force on the pipe-shaped workpiece larger, and the pipe-shaped workpiece is not easy to rotate circumferentially relative to the rotating roller and the fixed cylinder after being clamped, greatly reducing the situation of wear of the pipe-shaped workpiece, achieving two goals with one action.

[0014] A further setting of the present utility model is that: there is a workpiece blank feeding port on the top wall of the fixed cylinder, and a finished product discharge port on the bottom wall of the fixed cylinder.

[0015] By adopting the above technical solution, the rotary drive motor is started, and the rotating roller is controlled to intermittently rotate at a certain frequency, so that the positioning grooves on the rotating roller are successively opposite to the blank feeding ports on the fixed cylinder body. When the positioning groove on the rotating roller is opposite to the blank feeding port on the fixed cylinder body, the workpiece to be clamped enters through the blank feeding port on the top wall of the fixed cylinder body and naturally falls into the respective positioning grooves on the rotating roller in the fixed cylinder body until the preliminary positioning of multiple blanks is completed. When the blank is preliminarily positioned, it rotates with the rotating roller. When the blank reaches the position with the smallest gap between the rotating roller and the inner wall of the fixed cylinder body, it is clamped by the extrusion of the inner wall of the fixed cylinder body. At this time, the sawing machine is started to perform processing operations on the clamped blank. After processing, the rotating roller continues to rotate, and the processed workpiece will continue to rotate synchronously with the rotating roller. At this time, the position of the workpiece on the rotating roller will gradually move from the position with the smallest gap between the rotating roller and the inner wall of the fixed cylinder body to the position with the largest gap between the rotating roller and the inner wall of the fixed cylinder body. Therefore, the inner wall of the fixed cylinder body will gradually separate from the workpiece and the distance will become farther and farther. When the rotating roller rotates to a certain angle where the positioning groove supporting the workpiece loses support for the workpiece, the workpiece will directly fall out of the positioning groove and slide along the inner wall of the fixed cylinder body to the finished product discharge port at its bottom wall and be discharged from the finished product discharge port, realizing the automatic unloading and discharging of the workpiece, without manual operation. The whole process is automatic and continuous, not only with high efficiency, but also with low manual labor intensity.

[0016] The further setting of the present utility model is that: the ejecting mechanism includes an ejecting block, the ejecting block is arc-shaped, and the circumference where the arc-shaped ejecting block is located coincides with the circumference where each positioning groove is located.

[0017] By adopting the above technical solution, the ejecting block is used to axially eject the blank that falls into the positioning groove and is preliminarily positioned by the positioning groove, so that the length from the end of the blank in contact with the ejecting block to the processing position when the blank is clamped matches the set size of the workpiece, ensuring that workpieces of uniform size can be obtained after the blanks of different lengths are processed by the sawing machine. Therefore, axial positioning of the blank is achieved while clamping, making the processing accuracy of the workpiece higher.

[0018] The further setting of the present utility model is that: the thickness of the ejecting block gradually increases from the end close to the blank feeding port to the end far from the blank feeding port.

[0019] By adopting the above technical solution, when the workpiece rotates with the rotating roller after falling into the positioning groove from the blank feeding port, its end rotates from the end of the ejecting block close to the blank feeding port to the end far from the blank feeding port. Since the thickness of the ejecting block gradually increases from the end close to the blank feeding port to the end far from the blank feeding port, the workpiece will be automatically axially ejected as the thickness of the ejecting block increases during the rotation with the rotating roller, without additional power, with low cost and high efficiency.

[0020] A further setting of the present utility model is that the ejector block is installed on the inner wall of the fixed cylinder through an ejector length adjusting mechanism.

[0021] By adopting the above technical solution, the ejector length adjusting mechanism is used to adjust the ejection distance of the ejector block, so as to realize the positioning operation of the workpiece at different axial positions, enabling the sawing machine to adjust different processing sizes and making the device more versatile.

[0022] A further setting of the present utility model is that the ejector length adjusting mechanism includes a turntable fixedly connected to the ejector block. The turntable is rotationally connected to a rotating shaft, and the turntable is connected to a rotation adjusting mechanism.

[0023] By adopting the above technical solution, when it is necessary to adjust the ejection distance of the ejector block, the rotation adjusting mechanism is used to drive the turntable to rotate a certain angle. When the turntable rotates, it drives the ejector block to rotate synchronously, so that the position with different thicknesses of the ejector block reaches the position where the gap between the rotating roller and the inner wall of the fixed cylinder is the smallest, thereby realizing the adjustment of the axial position where the workpiece reaches the position with the smallest gap between the rotating roller and the inner wall of the fixed cylinder and being clamped. The adjustment process is simple and the operation is convenient.

[0024] A further setting of the present utility model is that the rotation adjusting mechanism includes a toothed ring arranged on the edge of the turntable and a gear meshing with the toothed ring. The gear is rotationally connected to the fixed cylinder through a gear rotating shaft, and the gear rotating shaft is connected to a rotation adjusting motor fixed outside the fixed cylinder.

[0025] By adopting the above technical solution, when it is necessary to drive the turntable to rotate, the rotation adjusting motor is started. The rotation adjusting motor drives the gear rotating shaft to rotate. When the gear rotating shaft rotates, it drives the gear to rotate. When the gear rotates, it drives the toothed ring meshing with it to rotate. When the toothed ring rotates, it drives the turntable to rotate. When the turntable rotates, the adjustment of the axial positioning position of the workpiece can be realized. The structure is simple and the operation is convenient.

[0026] A further setting of the present utility model is that rubber coatings are provided on the inner wall of the positioning groove and the fixed cylinder.

[0027] By adopting the above technical solution, the setting of the rubber coating further reduces the occurrence of workpiece wear. At the same time, the rubber coating also has a certain buffering effect, making the workpiece not easily damaged due to friction, collision or extrusion, and further improving the quality of workpiece processing.

[0028] The beneficial effects of the present utility model are:

[0029] 1. The utility model places the blank to be processed in the positioning groove at the top of the rotating roller, and then starts the rotary drive motor, so that the rotary drive motor drives the rotating roller to rotate. When the rotating roller rotates to the position where the blank reaches the minimum gap between the rotating roller and the inner wall of the fixed cylinder, the blank is tightly pressed against the positioning groove by the inner wall of the fixed cylinder, thus realizing the clamping operation of the blank. After the blank is clamped, the part to be sawed off extends from one end of the opening of the fixed cylinder and faces the processing position, so that the sawing machine can complete the processing operation. The part left in the positioning groove after processing is the workpiece. The whole tooling structure is simple, the clamping operation is convenient, the clamping efficiency is high, and the clamping position of the workpiece is integrally wrapped in the positioning groove, not easily deformed by pressure, and will not cause damage to the part, making the quality of workpiece processing better.

[0030] 2. The utility model uses the positioning groove with a semi-circular arc cross-section to position and clamp the workpiece. The semi-circular arc-shaped positioning groove has a better fit with the outer circle of the pipe-shaped workpiece. Therefore, after the blank is clamped, the contact area with the positioning groove is larger. On the one hand, while ensuring a better clamping effect on the pipe-shaped workpiece, the clamping extrusion force on the pipe-shaped workpiece can be dispersed, thereby further reducing the situation of excessive local pressure of the workpiece and deformation. On the other hand, it also makes the frictional force on the pipe-shaped workpiece larger, and the pipe-shaped workpiece is not easy to rotate circumferentially relative to the rotating roller and the fixed cylinder, greatly reducing the wear of the pipe-shaped workpiece, killing two birds with one stone.

[0031] 3. The utility model axially ejects the blank that falls into the positioning groove and is initially positioned by the positioning groove through the ejector block, so that workpieces of unified size can be obtained after the blanks of different lengths are processed by the sawing machine. Therefore, axial positioning of the blank is realized while clamping, making the processing accuracy of the workpiece higher.

[0032] 4. The utility model adjusts the ejection distance of the ejector block through the ejection length adjustment mechanism, thereby realizing the positioning operation of different axial positions of the workpiece, enabling the sawing machine to adjust different processing sizes, and making the device more versatile.

[0033] 5. The utility model further reduces the occurrence of workpiece wear by setting rubber coatings on the inner wall of the positioning groove and the fixed cylinder. At the same time, the rubber coating also has a certain buffering effect, making the workpiece not easily damaged due to friction, collision or extrusion, and further improving the quality of workpiece processing. Brief Description of the Drawings

[0034] To more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the attached drawings required for description in the embodiments. Obviously, the attached drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other attached drawings can also be obtained based on these drawings.

[0035] Figure 1 is a schematic three-dimensional structure diagram of a clamping device for sawing machine workpieces of the present utility model.

[0036] Figure 2 is a schematic cross-sectional structure diagram of a clamping device for sawing machine workpieces of the present utility model.

[0037] Figure 3 is a schematic connection structure diagram of a fixed cylinder and a blank feeding mechanism in a clamping device for sawing machine workpieces of the present utility model.

[0038] In the figure, 1, workbench; 2, base; 3, fixed cylinder; 4, rotating roller; 5, blank feeding mechanism; 51, blank feeding block; 53, turntable; 54, gear ring; 55, gear; 56, gear rotating shaft; 57, rotation adjustment motor; 6, positioning groove; 7, rotating shaft; 8, bracket; 9, rotation driving motor; 10, blank feeding inlet; 11, finished product discharge outlet. Specific embodiments

[0039] The following will clearly and completely describe the technical solutions of the present utility model in combination with specific embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, rather than 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 efforts belong to the scope of protection of the present utility model.

[0040] As Figures 1 to 3 shown, a clamping device for sawing machine workpieces includes a base 2 fixed on a workbench 1. Above the base 2, there is a fixed cylinder 3. Inside the fixed cylinder 3, there is a rotating roller 4. The rotating roller 4 is located on the horizontal side of the axis of the fixed cylinder 3 and is parallel to the axis of the fixed cylinder 3. One end of the fixed cylinder 3 opposite to the processing position is an opening. At the end of the fixed cylinder 3 far from the processing position, there is a blank feeding mechanism 5. A plurality of positioning grooves 6 are circumferentially distributed on the outer wall of the rotating roller 4. The rotating roller 4 is rotationally connected to a bracket 8 fixed on the base 2 through a rotating shaft 7. One end of the rotating shaft 7 is connected to a rotation driving motor 9 fixed on the base 2.

[0041] Furthermore, the cross-section of the positioning groove 6 is semi-circular or V-shaped.

[0042] Furthermore, the cross-section of the positioning groove 6 is semi-circular.

[0043] Further, a blank feeding port 10 is provided on the top wall of the fixed cylinder body 3, and a finished product discharge port 11 is provided on the bottom wall of the fixed cylinder body 3.

[0044] Further, the blank pushing mechanism 5 includes a blank pushing block 51, the blank pushing block 51 is arc-shaped, and the circumference where the arc-shaped blank pushing block 51 is located coincides with the circumference where each positioning groove 6 is located.

[0045] Further, the thickness of the blank pushing block 51 gradually increases from the end close to the blank feeding port 10 to the end far from the blank feeding port 10.

[0046] Further, the blank pushing block 51 is installed on the inner wall of the fixed cylinder body 3 through a blank pushing length adjusting mechanism.

[0047] Further, the blank pushing length adjusting mechanism includes a turntable 53 fixedly connected to the blank pushing block 51, the turntable 53 is rotatably connected to a rotating shaft 7, and the turntable 53 is connected to a rotation adjusting mechanism.

[0048] Further, the rotation adjusting mechanism includes a toothed ring 54 arranged on the edge of the turntable 53 and a gear 55 meshing with the toothed ring 54. The gear 55 is rotatably connected to the fixed cylinder body 3 through a gear rotating shaft 56, and the gear rotating shaft 56 is connected to a rotation adjusting motor 57 fixed outside the fixed cylinder body 3.

[0049] Further, rubber coatings are provided on the inner walls of the positioning grooves 6 and the fixed cylinder body 3.

[0050] Working principle of the present utility model: Start the rotation driving motor 9 and control the rotating roller 4 to intermittently rotate at a certain frequency, so that the positioning grooves 6 on the rotating roller 4 are successively opposite to the blank feeding port 10 on the fixed cylinder body 3. When the positioning grooves 6 on the rotating roller 4 are opposite to the blank feeding port 10 on the fixed cylinder body 3, the workpiece to be clamped enters through the blank feeding port 10 on the top wall of the fixed cylinder body 3 and naturally falls into the respective positioning grooves 6 on the rotating roller 4 in the fixed cylinder body 3 until the preliminary positioning of multiple blanks is completed.

[0051] The positioning groove 6 with a semi-circular arc cross-section has better fitting with the outer circle of the pipe-shaped workpiece. Therefore, after the blank is clamped, the contact area with the positioning groove 6 is larger. On the one hand, while ensuring better clamping effect of the pipe-shaped workpiece, the clamping extrusion force received by the pipe-shaped workpiece can be dispersed, thereby further reducing the situation of excessive local pressure of the workpiece and deformation. On the other hand, it also makes the friction force received by the pipe-shaped workpiece larger, and it is not easy for the pipe-shaped workpiece to rotate circumferentially relative to the rotating roller 4 and the fixed cylinder body 3 after being clamped, greatly reducing the situation of wear of the pipe-shaped workpiece, achieving two goals with one action.

[0052] When the workpiece falls from the blank feeding port 10 into the positioning groove 6 and rotates with the rotating roller 4, the end of the workpiece rotates from one end of the ejector block 51 close to the blank feeding port 10 to the end away from the blank feeding port 10. Since the thickness of the ejector block 51 gradually increases from the end close to the blank feeding port 10 to the end away from the blank feeding port 10, the workpiece will be automatically axially ejected as the thickness of the ejector block 51 increases during the rotation with the rotating roller 4, so that the length from the end of the blank in contact with the ejector block 51 to the processing position matches the set size of the workpiece when the blank is clamped, ensuring that workpieces of uniform size can be obtained after the sawing machine processes blanks of different lengths. Therefore, axial positioning of the blank is achieved while clamping, making the machining accuracy of the workpiece higher.

[0053] When the blank reaches the position with the minimum gap between the rotating roller 4 and the inner wall of the fixed cylinder 3, it is clamped by the inner wall of the fixed cylinder 3. At this time, the sawing machine is started to process the clamped blank. After processing, the rotating roller 4 continues to rotate, and the processed workpiece will continue to rotate synchronously with the rotating roller 4. At this time, the position of the workpiece on the rotating roller 4 will gradually move from the position with the minimum gap between the rotating roller 4 and the inner wall of the fixed cylinder 3 to the position with the maximum gap between the rotating roller 4 and the inner wall of the fixed cylinder 3. Therefore, the inner wall of the fixed cylinder 3 will gradually separate from the workpiece and the distance will become farther and farther. When the rotating roller 4 rotates to a certain angle where the positioning groove 6 supporting the workpiece loses support for the workpiece, the workpiece will directly fall from the positioning groove 6 and slide along the inner wall of the fixed cylinder 3 to the finished product discharge port 11 at its bottom wall and be discharged from the finished product discharge port 11, realizing automatic unloading and discharging of the workpiece without manual operation. The whole process is automatic and continuous, not only with high efficiency but also with low labor intensity for workers.

Claims

1. A sawing machine workpiece clamping device, characterized in that: The invention comprises a base (2) fixed on a workbench (1), a fixed cylinder (3) being arranged above the base (2), a rotating roller (4) being arranged inside the fixed cylinder (3), the rotating roller (4) being located on a horizontal side of the axis of the fixed cylinder (3) and being parallel to the axis of the fixed cylinder (3), the end of the fixed cylinder (3) opposite to the processing position being open, the end of the fixed cylinder (3) away from the processing position being arranged with a material ejecting mechanism (5), a plurality of positioning grooves (6) being distributed circumferentially on the outer wall of the rotating roller (4), the rotating roller (4) being rotatably connected to a bracket (8) fixed on the base (2) via a rotating shaft (7), and one end of the rotating shaft (7) being connected to a rotating drive motor (9) fixed on the base (2).

2. A sawing machine workpiece clamping device according to claim 1, characterized in that: The cross section of the positioning groove (6) is semicircular arc or V-shaped.

3. A sawing machine workpiece clamping device according to claim 1, characterized in that: The cross section of the positioning groove (6) is semicircular.

4. A sawing machine workpiece clamping device according to claim 1, characterized in that: A blank feeding port (10) is provided on the top wall of the fixed cylinder (3), and a finished product discharge port (11) is provided on the bottom wall of the fixed cylinder (3).

5. A sawing machine workpiece clamping device according to claim 4, characterized in that: The ejection mechanism (5) comprises an ejection block (51), the ejection block (51) is arc-shaped, and the circumference of the arc-shaped ejection block (51) coincides with the circumference of each positioning groove (6).

6. A sawing machine workpiece clamping device according to claim 5, characterized in that: The thickness of the ejecting block (51) gradually increases from the end close to the blank feeding port (10) to the end away from the blank feeding port (10).

7. A sawing machine workpiece clamping device according to claim 6, characterized in that: The lifting block (51) is installed on the inner wall of the fixed cylinder (3) through a lifting length adjustment mechanism.

8. A sawing machine workpiece clamping device according to claim 7, characterized in that: The ejection length adjustment mechanism comprises a rotating disk (53) fixedly connected to the ejection block (51); the rotating disk (53) is rotationally connected to the rotating shaft (7); and the rotating disk (53) is connected to the rotation adjustment mechanism.

9. A sawing machine workpiece clamping device according to claim 8, characterized in that: The rotation adjustment mechanism comprises a gear ring (54) arranged on the edge of a rotating disk (53) and a gear (55) meshing with the gear ring (54); the gear (55) is rotationally connected to the fixed cylinder (3) via a gear shaft (56); and the gear shaft (56) is connected to a rotation adjustment motor (57) fixed outside the fixed cylinder (3).

10. The sawing machine workpiece clamping device according to claim 1, characterized in that: The positioning groove (6) and the inner wall of the fixed cylinder (3) are provided with a rubber coating.

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