Hydraulic type rough positioning work fixture capable of preventing workblank from deviating

Abstract

The utility model discloses a hydraulic type rough positioning workblank deviation prevention work fixture which comprises a base, a machining table is installed at the top end of the base, a first clamping plate and a second clamping plate which are opposite to each other and can be movably opened and closed are arranged on the machining table, and the second clamping plate is installed on an installation frame arranged on the machining table. The first clamping plate clamps and limits the two sides of the workpiece, the second clamping plate limits the top of the workpiece, the clamping and limiting stability of the workpiece can be improved through three-direction clamping, and therefore the function of enhancing the clamping stability is achieved. In addition, the clamping area of the first clamping plate can be increased through the auxiliary clamping plate, whether installation is conducted or not can be selected according to the size of the workpiece in the using process, and workpiece clamping can be achieved more flexibly. The device is further provided with a reserved cavity and a collecting screen frame, chippings generated during workpiece machining can be sucked into the reserved cavity through the suction air pump, and the chippings can be collected in a centralized mode through the collecting screen frame in the reserved cavity.

Description

Technical Field

[0001] The utility model relates to a clamp, in particular to a hydraulic type coarse positioning tool clamp for preventing a blank from deflecting. Background Art

[0002] Hydraulic fixtures are a type of fixture that uses hydraulic components instead of mechanical parts. They achieve automatic positioning, support, and clamping of workpieces through hydraulic control. They have the advantages of large clamping force, reliable clamping, stable operation, and easy use. They are widely used in CNC machine tools, machining centers, automated production lines, and other scenarios. Hydraulic fixtures have the problem of few clamping positions and poor clamping effect during use. For example, most common hydraulic fixtures on the market use side clamping. When processing some workpieces, the top cannot be clamped and the problem of displacement is easy to occur. Moreover, when some workpieces need to be processed on the side, the side clamping cannot be stably clamped and affects the processing efficiency. Therefore, the market is in urgent need of improved hydraulic fixtures to solve the aforementioned problem of workpiece displacement caused by few clamping positions and poor clamping effect. The utility model patent with announcement number CN218592404U discloses a highly stable hydraulic clamp. This utility model has the advantages of easy operation, stable force and good fluency. However, this utility model only has two side clamps for clamping parts, and also has the aforementioned problems of limited clamping positions, poor clamping effect, and workpiece offset. It is only suitable for clamping parts of specific shapes. Utility Model Content

[0003] The existing hydraulic fixtures have limited clamping positions, poor clamping effect, and workpiece offset. To overcome these defects, the utility model provides a hydraulic rough positioning fixture that prevents the blank from offsetting, which can clamp in multiple positions and enhance the clamping effect.

[0004] The technical solution of this utility model is a hydraulically operated coarse positioning fixture for preventing workpiece offset. The fixture comprises a base with a processing table mounted on top. The processing table is provided with a first clamping plate and a second clamping plate that are movable relative to each other. The second clamping plate is mounted on a mounting bracket mounted on the processing table. The first clamping plate clamps and limits the workpiece on both sides, while the second clamping plate limits the top of the workpiece. This three-way clamping improves the stability of the workpiece clamping and limiting, thereby achieving a function of enhancing clamping stability.

[0005] Preferably, a first hydraulic cylinder is mounted on either side of the top of the processing table, with the first clamping plate fixed to the output end of the first hydraulic cylinder. A support rod is provided on the outside of the first hydraulic cylinder, and a mounting bracket is mounted on the top end of the support rod. A second hydraulic cylinder is mounted in the middle of the bottom end of the mounting bracket, with the second clamping plate fixed to the output end of the second hydraulic cylinder. The mounting bracket is mounted on the support rod to achieve sufficient height and provide mounting support for the first hydraulic cylinder. The first hydraulic cylinder provides power to the first clamping plate, enabling the first clamping plate to move and open; the second hydraulic cylinder provides power to the second clamping plate, enabling the second clamping plate to be raised and lowered.

[0006] Preferably, mounting sleeves are fixedly connected to both sides of the bottom end of the mounting bracket, and the mounting sleeves are provided with fixing bolts. The mounting sleeves are sleeved onto the top of the support rod, and the mounting sleeves and the support rod are connected and fixed by fixing bolts. The mounting bracket is connected to the support rod through the mounting sleeves and fixed by fixing bolts, so that the mounting bracket is stably installed on the processing table.

[0007] Preferably, an auxiliary clamping plate is mounted on the top of the first clamping plate, with a mounting block fixedly connected to the bottom of the auxiliary clamping plate. The first clamping plate has a mounting slot defined therein, and the mounting block is embedded within the slot. The auxiliary clamping plate serves to increase the clamping area of ​​the first clamping plate and can be installed or not depending on the size of the workpiece, facilitating more flexible workpiece clamping.

[0008] Preferably, mounting bolts are inserted through the walls of the mounting slot, and the mounting slot and the mounting block are connected by the mounting bolts. The mounting block at the bottom of the auxiliary clamping plate is inserted into the interior of the mounting slot, and then the mounting block and the mounting slot are locked with the mounting bolts, thereby securing the auxiliary clamping plate to the first clamping plate.

[0009] Preferably, a reserved chamber is provided inside the processing table, an extraction air pump is installed inside the reserved chamber, and a collection net frame is installed above the extraction air pump. If the fixture is used on machining equipment such as a lathe, the debris generated during workpiece processing can be sucked into the reserved chamber by the extraction air pump, and the collection net frame inside the reserved chamber can collect the debris in a centralized manner. After processing is completed, the collection net frame can be removed from the reserved chamber for cleaning, thereby realizing the function of the fixture to facilitate the collection of debris.

[0010] Preferably, connecting blocks are fixedly connected to both sides of the collection screen frame, and connecting slots are fixedly connected to both sides of the reserved chamber, and the connecting blocks are embedded in the connecting slots. Through the cooperation of the connecting blocks and the connecting slots, the collection screen frame can be detachably installed in the reserved chamber, which is convenient for installation and removal.

[0011] Preferably, the top of the processing table is evenly provided with chip removal holes, which are connected to the interior of the reserved cavity. The chips generated during processing can enter the reserved cavity through the chip removal holes and be removed in time to prevent accumulation on the processing table surface.

[0012] The beneficial effects of the utility model are:

[0013] Enhanced clamping effect: The utility model can clamp the workpiece in three directions, which can improve the stability of the workpiece clamping limit and thus enhance the clamping effect.

[0014] Flexible clamping of workpieces of different sizes. The utility model can increase the clamping area of ​​the first clamping plate through the auxiliary clamping plate. When in use, the auxiliary clamping plate can be installed according to the size of the workpiece, so as to achieve more flexible workpiece clamping.

[0015] The utility model is provided with a reserved chamber and a collection net frame, and the debris generated during the workpiece processing can be sucked into the interior of the reserved chamber by the extraction air pump, and the collection net frame inside the reserved chamber can collect the debris in a centralized manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural diagram of the present utility model.

[0017] Figure 2 This is a front view structural diagram of the second hydraulic cylinder in the present utility model.

[0018] Figure 3 This is another structural diagram of the present utility model.

[0019] Figure 4 This is a partially enlarged structural schematic diagram of the utility model.

[0020] Figure 5 This is a schematic structural diagram of the utility model in Example 3.

[0021] Figure 6 It is a partial cross-sectional structural schematic diagram of the collecting screen frame in the present invention when viewed from the front.

[0022] Figure 7 This is a schematic structural diagram of the utility model in Example 4.

[0023] In the figure: 1-base; 2-processing table; 3-first hydraulic cylinder; 4-first clamping plate; 5-reserved chamber; 6-chip removal hole; 7-support rod; 8-mounting frame; 9-second hydraulic cylinder; 10-second clamping plate; 11-collecting net frame; 12-mounting sleeve; 13-auxiliary clamping plate; 14-extraction air pump; 15-fixing bolt; 16-mounting slot; 17-mounting block; 18-mounting bolt; 19-connecting block; 20-connecting slot. DETAILED DESCRIPTION

[0024] The present invention will be further described below with reference to the specific embodiments of the drawings.

[0025] Example 1:

[0026] like Figure 1 、 Figure 2 As shown, a hydraulic coarse positioning fixture for preventing the offset of a blank comprises a base 1, a processing table 2, a pair of first clamping plates 4, and a second clamping plate 10. The processing table 2 is mounted on the top of the base 1. The two first clamping plates 4 are arranged on both sides of the top of the processing table 2 and can move toward each other and away from each other to achieve opening and closing. A door-shaped mounting frame 8 is provided above the processing table 2. The mounting frame 8 includes a crossbeam and support legs. The support legs are welded to both ends of the crossbeam. The second clamping plate 10 is mounted on the mounting frame 8 and can be raised and lowered. A pair of first hydraulic cylinders 3 and a pair of support rods 7 are installed on the processing table 2. The two first hydraulic cylinders 3 are arranged on both sides of the top of the processing table 2. The two first clamping plates 4 are fixed to the output ends of the two first hydraulic cylinders 3 in a one-to-one correspondence. The two support rods 7 are mounted to the outside of the two first hydraulic cylinders 3 in a one-to-one correspondence by bolts. Mounting sleeves 12 are welded to the bottom ends of the two legs of mounting bracket 8. The top end of support rod 7 is inserted into mounting sleeves 12, forming a sleeve-fitting fit with them. Mounting sleeve 12 has a mounting sleeve connection hole and a fixing bolt 15 at its front end. Fixing bolt 15 passes through the mounting sleeve connection hole and forms a threaded connection with support rod 7, securing mounting sleeve 12 to support rod 7 and ensuring a stable mounting of mounting bracket 8 to the top end of support rod 7. A second hydraulic cylinder 9 is bolted to the middle of the bottom end of mounting bracket 8. A second clamping plate 10 is fixed to the output end of the second hydraulic cylinder 9. The position of the second clamping plate 10 forms an isosceles triangle with the positions of the two first clamping plates 4. The first and second hydraulic cylinders 3 and 9 are connected to an oil pump via a pipeline. The pipeline is equipped with an electromagnetic oil valve, which is controlled by a button or controller.

[0027] Under normal conditions, the two first clamping plates 4 of the present invention are in a separated state, and the second clamping plate 10 is in a raised state. When using the present invention, place the workpiece on the surface of the processing table 2 between the two first clamping plates 4, and try to keep the distance from the two first clamping plates 4 equal. By switching the working state of the electromagnetic oil valve to start the first hydraulic cylinder 3, the two first hydraulic cylinders 3 push the first clamping plates 4 to move toward each other, and approach synchronously from both sides of the workpiece until they are against the side of the workpiece, thereby clamping and limiting the two sides of the workpiece. After the two sides of the workpiece are clamped, start the second hydraulic cylinder 9, and the second hydraulic cylinder 9 pushes the second clamping plate 10 down until it presses the top of the workpiece, thereby limiting and supporting the top of the workpiece. Clamping in three directions can improve the stability of the workpiece clamping and limiting.

[0028] Example 2:

[0029] like Figure 3 、 Figure 4As shown, a hydraulic coarse positioning fixture for preventing the offset of a blank comprises a base 1, a processing table 2, a pair of first clamping plates 4, and a second clamping plate 10. The processing table 2 is mounted on the top of the base 1. The two first clamping plates 4 are arranged on both sides of the top of the processing table 2 and can move toward each other and away from each other to achieve opening and closing. A door-shaped mounting frame 8 is provided above the processing table 2. The mounting frame 8 includes a crossbeam and support legs. The support legs are welded to both ends of the crossbeam. The second clamping plate 10 is mounted on the mounting frame 8 and can be raised and lowered. A pair of first hydraulic cylinders 3 and a pair of support rods 7 are installed on the processing table 2. The two first hydraulic cylinders 3 are arranged on both sides of the top of the processing table 2. The two first clamping plates 4 are fixed to the output ends of the two first hydraulic cylinders 3 in a one-to-one correspondence. The two support rods 7 are mounted to the outside of the two first hydraulic cylinders 3 in a one-to-one correspondence by bolts. Mounting sleeves 12 are welded to the bottom ends of the two legs of mounting bracket 8. The top end of support rod 7 is inserted into mounting sleeves 12, forming a sleeve-fitting fit with them. Mounting sleeve 12 has a mounting sleeve connection hole and a fixing bolt 15 at its front end. Fixing bolt 15 passes through the mounting sleeve connection hole and forms a threaded connection with support rod 7, securing mounting sleeve 12 to support rod 7 and ensuring a stable mounting of mounting bracket 8 to the top end of support rod 7. A second hydraulic cylinder 9 is bolted to the middle of the bottom end of mounting bracket 8. A second clamping plate 10 is fixed to the output end of the second hydraulic cylinder 9. The position of the second clamping plate 10 forms an isosceles triangle with the positions of the two first clamping plates 4. The first and second hydraulic cylinders 3 and 9 are connected to an oil pump via a pipeline. The pipeline is equipped with an electromagnetic oil valve, which is controlled by a button or controller.

[0030] Unlike Example 1, this embodiment further includes an auxiliary clamping plate 13, the bottom end of which is fixed with a mounting block 17 by bolts. A mounting slot 16 is provided inside the first clamping plate 4, which opens at the top end of the first clamping plate 4. The mounting block 17 fits in the mounting slot 16, and a mounting bolt 18 is passed through the groove wall of the mounting slot 16. After the mounting block 17 is inserted into the mounting slot 16, the mounting bolt 18 penetrates the first clamping plate 4, enters the mounting slot 16, and then forms a threaded connection with the mounting block 17, thereby fixing the auxiliary clamping plate 13 to the top end of the first clamping plate 4. The rest of the structure is the same as in Example 1.

[0031] Under normal conditions, the two first clamping plates 4 of the present invention are in a separated state, and the second clamping plate 10 is in a raised state. When using the present invention, the workpiece is placed on the surface of the processing table 2 between the two first clamping plates 4, and is kept as close to the two first clamping plates 4 as possible. The first hydraulic cylinder 3 is started by switching the working state of the electromagnetic oil valve. The two first hydraulic cylinders 3 push the first clamping plates 4 toward each other, and approach synchronously from both sides of the workpiece until they are against the sides of the workpiece, thereby clamping and limiting the workpiece on both sides. After the workpiece is clamped on both sides, the second hydraulic cylinder 9 is started. The second hydraulic cylinder 9 pushes the second clamping plate 10 down until it presses the top of the workpiece, thereby limiting and supporting the top of the workpiece. The clamping in three directions can improve the stability of the workpiece clamping and limiting. The auxiliary clamping plate 13 is used to increase the clamping area of ​​the first clamping plate 4. When in use, it can be selected whether to install it according to the size of the workpiece, so as to facilitate more flexible workpiece clamping.

[0032] Example 3:

[0033] like Figure 5 、 Figure 6 As shown, a hydraulic coarse positioning fixture for preventing the offset of a blank comprises a base 1, a processing table 2, a pair of first clamping plates 4, and a second clamping plate 10. The processing table 2 is mounted on the top of the base 1. The two first clamping plates 4 are arranged on both sides of the top of the processing table 2 and can move toward each other and away from each other to achieve opening and closing. A door-shaped mounting frame 8 is provided above the processing table 2. The mounting frame 8 includes a crossbeam and support legs. The support legs are welded to both ends of the crossbeam. The second clamping plate 10 is mounted on the mounting frame 8 and can be raised and lowered. A pair of first hydraulic cylinders 3 and a pair of support rods 7 are installed on the processing table 2. The two first hydraulic cylinders 3 are arranged on both sides of the top of the processing table 2. The two first clamping plates 4 are fixed to the output ends of the two first hydraulic cylinders 3 in a one-to-one correspondence. The two support rods 7 are mounted to the outside of the two first hydraulic cylinders 3 in a one-to-one correspondence by bolts. Mounting sleeves 12 are welded to the bottom ends of the two legs of mounting bracket 8. The top end of support rod 7 is inserted into mounting sleeves 12, forming a sleeve-fitting fit with them. Mounting sleeve 12 has a mounting sleeve connection hole and a fixing bolt 15 at its front end. Fixing bolt 15 passes through the mounting sleeve connection hole and forms a threaded connection with support rod 7, securing mounting sleeve 12 to support rod 7 and ensuring a stable mounting of mounting bracket 8 to the top end of support rod 7. A second hydraulic cylinder 9 is bolted to the middle of the bottom end of mounting bracket 8. A second clamping plate 10 is fixed to the output end of the second hydraulic cylinder 9. The position of the second clamping plate 10 forms an isosceles triangle with the positions of the two first clamping plates 4. The first and second hydraulic cylinders 3 and 9 are connected to an oil pump via a pipeline. The pipeline is equipped with an electromagnetic oil valve, which is controlled by a button or controller.

[0034] Unlike Example 1, the interior of the processing table 2 in this embodiment is provided with a reserved chamber 5 and a collection frame 11 for collecting debris generated during workpiece processing, and an extraction air pump 14 is installed at the bottom end of the reserved chamber 5. Connecting blocks 19 are fixed on both sides of the collection frame 11 by bolts, and connecting slots 20 are fixed on the inner walls of both sides of the reserved chamber 5 by bolts. The connecting blocks 19 are embedded in the connecting slots 20, so that the collection frame 11 is installed overhead above the extraction air pump 14. Chip removal holes 6 are evenly opened on the top of the processing table 2. The chip removal holes 6 are connected to the interior of the reserved chamber 5. When the extraction air pump 14 is in operation, a negative pressure is formed in the reserved chamber 5, so that the chips can enter the reserved chamber 5 through the chip removal holes 6 and be retained and accumulated on the collection frame 11.

[0035] The present utility model can be used for positioning workpieces on equipment such as drilling machines, lathes, and milling machines. Under normal circumstances, the two first clamping plates 4 are in a separated state, and the second clamping plate 10 is in a raised state. When using the present utility model, the workpiece is placed on the surface of the processing table 2 between the two first clamping plates 4, and is kept as close as possible to the two first clamping plates 4. The first hydraulic cylinder 3 is started by switching the working state of the electromagnetic oil valve, and the two first hydraulic cylinders 3 push the first clamping plates 4 to move toward each other, and approach synchronously from both sides of the workpiece until they are against the side of the workpiece, thereby clamping and limiting the two sides of the workpiece. After the workpiece is clamped on both sides, the second hydraulic cylinder 9 is started, and the second hydraulic cylinder 9 pushes the second clamping plate 10 down until it presses the top of the workpiece, thereby limiting and supporting the top of the workpiece. The clamping in three directions can improve the stability of the workpiece clamping and limiting. The debris generated during the workpiece processing can be sucked into the reserved chamber 5 by the extraction air pump 14, and the collection frame 11 can collect the debris in a centralized manner. After the processing is completed, the connecting card block 19 on the collection frame 11 is removed from the inside of the connecting card slot 20, and then the collection frame 11 is taken out from the inside of the reserved chamber 5 for cleaning.

[0036] Example 4:

[0037] like Figure 7As shown, a hydraulic coarse positioning fixture for preventing the offset of a blank comprises a base 1, a processing table 2, a pair of first clamping plates 4, and a second clamping plate 10. The processing table 2 is mounted on the top of the base 1. The two first clamping plates 4 are arranged on both sides of the top of the processing table 2 and can move toward each other and away from each other to achieve opening and closing. A door-shaped mounting frame 8 is provided above the processing table 2. The mounting frame 8 includes a crossbeam and support legs. The support legs are welded to both ends of the crossbeam. The second clamping plate 10 is mounted on the mounting frame 8 and can be raised and lowered. A pair of first hydraulic cylinders 3 and a pair of support rods 7 are installed on the processing table 2. The two first hydraulic cylinders 3 are arranged on both sides of the top of the processing table 2. The two first clamping plates 4 are fixed to the output ends of the two first hydraulic cylinders 3 in a one-to-one correspondence. The two support rods 7 are mounted to the outside of the two first hydraulic cylinders 3 in a one-to-one correspondence by bolts. Mounting sleeves 12 are welded to the bottom ends of the two legs of mounting bracket 8. The top end of support rod 7 is inserted into mounting sleeves 12, forming a sleeve-fitting fit with them. Mounting sleeve 12 has a mounting sleeve connection hole and a fixing bolt 15 at its front end. Fixing bolt 15 passes through the mounting sleeve connection hole and forms a threaded connection with support rod 7, securing mounting sleeve 12 to support rod 7 and ensuring a stable mounting of mounting bracket 8 to the top end of support rod 7. A second hydraulic cylinder 9 is bolted to the middle of the bottom end of mounting bracket 8. A second clamping plate 10 is fixed to the output end of the second hydraulic cylinder 9. The position of the second clamping plate 10 forms an isosceles triangle with the positions of the two first clamping plates 4. The first and second hydraulic cylinders 3 and 9 are connected to an oil pump via a pipeline. The pipeline is equipped with an electromagnetic oil valve, which is controlled by a button or controller.

[0038] Unlike Example 1, this embodiment further includes an auxiliary clamping plate 13, the bottom end of which is fixed with a mounting block 17 by bolts. A mounting slot 16 is provided inside the first clamping plate 4, and the mounting slot 16 opens at the top end of the first clamping plate 4. The mounting block 17 is adapted to the mounting slot 16, and a mounting bolt 18 is passed through the groove wall of the mounting slot 16. After the mounting block 17 is inserted into the mounting slot 16, the mounting bolt 18 penetrates the first clamping plate 4, enters the mounting slot 16, and then forms a threaded connection with the mounting block 17, so that the auxiliary clamping plate 13 is fixed to the top end of the first clamping plate 4. In addition, a reserved chamber 5 and a collection net frame 11 for collecting debris generated during workpiece processing are provided inside the processing table 2. An extraction air pump 14 is installed at the bottom end of the reserved chamber 5. Connecting blocks 19 are bolted to both sides of the collection frame 11. Connecting slots 20 are bolted to both sides of the inner wall of the reserved chamber 5. The connecting blocks 19 are inserted into the connecting slots 20, so that the collection frame 11 is mounted overhead above the extraction air pump 14. Chip removal holes 6 are evenly arranged on the top of the processing table 2. The chip removal holes 6 are connected to the interior of the reserved chamber 5. When the extraction air pump 14 is running, the reserved chamber 5 forms a negative pressure, allowing chips to enter the reserved chamber 5 through the chip removal holes 6 and be retained and accumulated on the collection frame 11.

[0039] The present invention can be used for workpiece positioning on equipment such as drilling machines, lathes, and milling machines. Under normal conditions, the two first clamping plates 4 are separated, while the second clamping plate 10 is raised. When using the present invention, the workpiece is placed on the processing table 2 between the two first clamping plates 4, maintaining a distance as close as possible from the two first clamping plates 4. By switching the electromagnetic oil valve operating state, the first hydraulic cylinder 3 is activated. The two first hydraulic cylinders 3 push the first clamping plates 4 toward each other, synchronously approaching from both sides of the workpiece until they contact the sides, thereby clamping and limiting the workpiece on both sides. After the workpiece is clamped on both sides, the second hydraulic cylinder 9 is activated, which pushes the second clamping plate 10 downward until it presses against the top of the workpiece, thereby limiting the top of the workpiece. This three-way clamping improves the stability of the workpiece clamping and limiting position. The auxiliary clamping plate 13 is used to increase the clamping area of ​​the first clamping plate 4. During use, it can be installed according to the size of the workpiece, facilitating more flexible workpiece clamping. The debris generated during the workpiece processing can be sucked into the reserved chamber 5 by the extraction air pump 14, and the collection frame 11 can collect the debris in a centralized manner. After the processing is completed, the connecting card block 19 on the collection frame 11 is removed from the inside of the connecting card slot 20, and then the collection frame 11 is taken out from the inside of the reserved chamber 5 for cleaning.

Claims

1. A hydraulic coarse positioning fixture for preventing blank deviation, comprising a base (1), characterized in that: A processing table (2) is installed on the top of the base (1). The processing table (2) is provided with a first clamping plate (4) that is relatively movable and openable and a second clamping plate (10) that is liftable. The second clamping plate (10) is installed on a mounting frame (8) provided on the processing table (2).

2. The hydraulic rough positioning fixture for preventing the blank from deflecting according to claim 1 is characterized in that: A first hydraulic cylinder (3) is installed on both sides of the top of the processing table (2), a first clamping plate (4) is fixed to the output end of the first hydraulic cylinder (3), a support rod (7) is provided on the outside of the first hydraulic cylinder (3), a mounting frame (8) is provided at the top of the support rod (7), a second hydraulic cylinder (9) is installed in the middle of the bottom end of the mounting frame (8), and a second clamping plate (10) is fixed to the output end of the second hydraulic cylinder (9).

3. The hydraulic rough positioning fixture for preventing the blank from deflecting according to claim 1 is characterized in that: The two sides of the bottom end of the mounting frame (8) are fixedly connected with mounting sleeves (12), and fixing bolts (15) are provided on the mounting sleeves (12). The mounting sleeves (12) are sleeved on the top end of the support rod (7), and the mounting sleeves (12) and the support rod (7) are connected and fixed by the fixing bolts (15).

4. The hydraulic rough positioning fixture for preventing the blank from deflecting according to claim 1 is characterized in that: An auxiliary clamping plate (13) is installed at the top end of the first clamping plate (4), and a mounting block (17) is fixedly connected to the bottom end of the auxiliary clamping plate (13). A mounting slot (16) is provided inside the first clamping plate (4), and the mounting block (17) is embedded in the mounting slot (16).

5. The hydraulic rough positioning fixture for preventing the blank from deflecting according to claim 4 is characterized in that: A mounting bolt (18) is connected to the groove wall of the mounting groove (16), and the mounting groove (16) and the mounting block (17) are connected via the mounting bolt (18).

6. The hydraulic rough positioning fixture for preventing the blank from deflecting according to claim 1 is characterized in that: A reserved chamber (5) is provided inside the processing table (2), an extraction air pump (14) is installed inside the reserved chamber (5), and a collection net frame (11) is installed above the extraction air pump (14).

7. The hydraulic rough positioning fixture for preventing the blank from deflecting according to claim 6 is characterized in that: Connecting blocks (19) are fixedly connected to both sides of the collecting net frame (11), connecting slots (20) are fixedly connected to both sides of the interior of the reserved chamber (5), and the connecting blocks (19) are embedded in the connecting slots (20).

8. The hydraulic rough positioning fixture for preventing the blank from deflecting according to any one of claims 1 to 7, characterized in that: Chip removal holes (6) are evenly formed on the top of the processing table (2), and the chip removal holes (6) are communicated with the interior of the reserved chamber (5).

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