Adjustable clamp for machining heavy long-shaft bar

Abstract

The invention relates to an adjustable clamp for processing a heavy long-shaft rod, which is characterized by comprising an indexing head positioning part, an adjustable fixed clamping part and a supporting table, the indexing head positioning part and the adjustable fixed clamping part are arranged on the supporting table, and the adjustable fixed clamping part is arranged on the supporting table. The positions of the dividing head positioning part and the adjustable fixed clamping part on the supporting table are arranged to be adjustable structures so as to adapt to workpieces with different lengths; the dividing head positioning part comprises a dividing head and a claw disc, the claw disc is installed at the front end of the dividing head, and a plurality of grabhooks are arranged in the claw disc to form a grabbing and clamping positioning structure; the adjustable fixing and clamping part comprises a bottom plate, an adjustable clamping structure and a height adjusting structure, the bottom plate is connected to the bottom plate through a plurality of bolts, the adjustable clamping structure and the height adjusting structure are fixedly connected to the bottom plate, the adjustable clamping structure is a left-right tightness adjusting type clamping structure, and the height adjusting structure is a right-left tightness adjusting type clamping structure. The height adjusting structure forms an up-down height adjusting type adjusting structure so that the workpiece can be kept straight. The device has the characteristics of simple structure, workpiece deformation prevention, high universality and the like.

Description

Technical Field

[0001] The present invention relates to a fixture, in particular to an adjustable fixture for machining heavy long shaft rods, which is applicable to assisting in fixing and clamping heavy long shaft rod workpieces and belongs to the technical field of machine tool processing mechanical equipment. Background Art

[0002] With the large demand for numerically controlled machine tools in the manufacturing industry and the rapid progress of modern design technology, the application scope of numerically controlled machine tools is constantly expanding, and the market's requirements for manufacturers are also getting higher and higher.

[0003] At present, heavy long shaft rod workpieces are a common type of workpiece in the machining of numerically controlled machine tools. In the prior art, due to defects in the structure of the tooling fixture, the following problems exist in the process of machining heavy long shaft rod workpieces: (1) It is easy to cause the workpiece to bend downward. Because when machining heavy long shaft rod workpieces, it is difficult for ordinary fixtures to clamp and fix them. Generally, one end is fixed by a chuck and the other end is in a free state, and the other end is easy to bend downward under the action of gravity; (2) It is necessary to replace the fixture back and forth to adapt to workpieces of different specifications. Because the diameters and other dimensions of various heavy long shaft rod workpieces are different, the existing tooling fixtures cannot be shared and need to be replaced back and forth.

[0004] After retrieving the Chinese patent announcements, no technical solutions for adjustable fixtures for fixing and clamping heavy long shaft rods and application methods of adjustable fixtures for fixing and clamping heavy long shaft rods with the same application methods have been found to be publicly disclosed in the Chinese patent announcements. Although the Chinese patent announcements also disclose some technical solutions of positioning fixtures, for example: the inventions with application numbers 2013100720845 and 2020115033766 and the utility model patent with application number 2017204123885. Although the described technical solutions can solve the clamping and positioning problems of workpieces and also have certain technical effects, they cannot solve the problem that heavy long-shaped workpieces are easy to bend downward during clamping and positioning. Therefore, it is necessary to provide an adjustable fixture for fixing and clamping heavy long-shaped workpieces to solve the problem that heavy long shaft rods are easy to bend downward during clamping and positioning in the prior art.

[0005] Therefore, it is necessary to invent an adjustable tooling fixture for fixing and clamping heavy long shaft rods. Summary of the Invention

[0006] The purpose of the present invention is to solve the problems that due to defects in the existing tooling fixture, the machining of heavy long shaft rod workpieces is prone to causing workpiece bending deformation and the need to replace the fixture back and forth, and to provide an adjustable fixture for machining heavy long shaft rods, which has prominent substantive features and remarkable technical progress such as simple and reasonable structure, preventing workpiece deformation, being applicable to workpieces of different specifications, strong versatility, convenient operation and high reliability.

[0007] The object of the present invention can be achieved by adopting the following technical solutions:

[0008] An adjustable fixture for machining heavy long-axis rods, characterized in that it includes a dividing head positioning part, an adjustable fixed clamping part and a support table. The dividing head positioning part and the adjustable fixed clamping part are arranged on the support table, and the positions of the dividing head positioning part and the adjustable fixed clamping part on the support table are set as adjustable structures to adapt to workpieces of different lengths; the dividing head positioning part includes a dividing head and a claw plate, the claw plate is installed at the front end of the dividing head, and there are several claws in the claw plate to form a grasping and positioning structure; the adjustable fixed clamping part includes a bottom plate, an adjustable clamping structure and a height adjustment structure. The bottom plate is connected to the bottom plate by several bolts to form a position-adjustable connection structure. The adjustable clamping structure and the height adjustment structure are fixedly connected to the bottom plate. The adjustable clamping structure is a left-right tightening and adjusting type clamping structure to position and clamp the workpiece, and the height adjustment structure constitutes an up-down height adjustment type adjustment structure to keep the workpiece straight.

[0009] The object of the present invention can also be achieved by adopting the following technical solutions:

[0010] Further, the adjustable clamping structure is composed of a left tightening adjustment unit and a right tightening adjustment unit. The left tightening adjustment unit and the right tightening adjustment unit are connected to the bottom plate by bolts to form a position-adjustable connection structure; the height adjustment structure is composed of an "L"-shaped part, a height adjustment bolt, an "L"-shaped part fastening bolt, an upper slider and a lower slider. The "L"-shaped part is connected to the bottom plate by the "L"-shaped part fastening bolt. The upper slider is movably clamped on the left tightening adjustment unit and the right tightening adjustment unit to form an up-down sliding connection structure. The connection between the upper slider and the lower slider is a complementary inclined plane connection. The height adjustment bolt passes through the "L"-shaped part and is movably connected to the lower slider to form a lifting drive connection structure.

[0011] Further, the left tightening adjustment unit is composed of a left "L"-shaped column and a left tightening adjustment bolt, and the right tightening adjustment unit is composed of a right "L"-shaped column and a right tightening adjustment bolt; the left tightening adjustment bolt is screwed on the left tightening adjustment unit, and the right tightening adjustment bolt is screwed on the right tightening adjustment unit to form a spiral tightening structure; the left "L"-shaped column and the right "L"-shaped column are fixed on the bottom plate; a left groove is provided on the inner side of the lower part of the left "L"-shaped column, and a right groove is provided on the inner side of the lower part of the middle "L"-shaped column. Vertical strip-shaped protrusions are provided on the left and right sides of the upper slider, and the sizes and shapes of the vertical strip-shaped protrusions correspond to those of the left groove and the right groove to form a fitting sliding connection structure.

[0012] Further, a limit piece is provided on the left tightening adjustment unit or the right tightening adjustment unit, and an upper slider elevation limiting piece is provided on the upper slider corresponding to the limit piece to limit the rising height of the upper slider.

[0013] Furthermore, several inverted "T"-shaped grooves are provided on the support table, and the bottom plate and the dividing head are connected in the "T"-shaped grooves by bolts to form a position-adjustable connection structure.

[0014] Furthermore, a dividing turntable is provided in the dividing head, and the power output end of the dividing turntable is connected to the driving input end of the claw plate to drive the claw plate to rotate clockwise or counterclockwise, so as to adjust the indexing position of the claw to accurately clamp the concave position of the workpiece.

[0015] Advantages and beneficial effects of the present invention

[0016] 1. In the present invention, since the positioning part of the dividing head and the adjustable fixed clamping part are arranged as adjustable structures at the position of the support table 4 to adapt to workpieces of different lengths; the positioning part of the dividing head includes a dividing head and a claw plate, the claw plate is installed at the front end of the dividing head, and several claws are provided in the claw plate to form a grasping and positioning structure; the adjustable fixed clamping part includes a bottom plate, an adjustable clamping structure and a height adjustment structure, and the bottom plate 1 is connected to the bottom plate by several bolts to form a position-adjustable connection structure, the adjustable clamping structure 6 and the height adjustment structure are fixedly connected to the bottom plate, the adjustable clamping structure is a left-right tightening and adjusting type clamping structure to position and clamp the workpiece, and the height adjustment structure constitutes an up-down height adjustment type adjustment structure to keep the workpiece flat. Therefore, it can solve the problems that the processing of heavy long-axis rod-shaped workpieces is prone to cause bending deformation of the workpiece and the need to replace the fixture back and forth due to the defects of the existing work fixtures, and has the outstanding substantive characteristics and remarkable technical progress of simple and reasonable structure, preventing workpiece deformation, being applicable to workpieces of different specifications, strong versatility, convenient operation and high reliability.

[0017] 2. The adjustable clamping structure of the present invention is composed of a left tightening adjustment unit and a right tightening adjustment unit, and the left tightening adjustment unit and the right tightening adjustment unit are connected to the bottom plate by bolts to form a position-adjustable connection structure; the height adjustment structure is composed of an "L"-shaped part, a height adjustment bolt, an "L"-shaped part fastening bolt, an upper slider and a lower slider, the "L"-shaped part is connected to the bottom plate by the "L"-shaped part fastening bolt, the upper slider is movably clamped on the left tightening adjustment unit and the right tightening adjustment unit to form an up-down sliding connection structure, the connection between the upper slider and the lower slider is a complementary inclined plane connection, and the height adjustment bolt passes through the "L"-shaped part and is movably connected to the lower slider to form a lifting drive connection structure. It has the characteristics of stable and firm clamping and simple operation. Brief description of the drawings

[0018] Figure 1 is a schematic structural diagram of the first specific embodiment of the present invention in the working state.

[0019] Figure 2 is a rear schematic structural diagram of the first specific embodiment of the present invention in the working state.

[0020] Figure 3 is Figure 1 a schematic structural view of the adjustable fixed clamping part in

[0021] Figure 4 is Figure 1 a rear view structural schematic of the adjustable fixed clamping part in Detailed implementation manners Specific embodiment 1:

[0023] Referring to Figures 1 to 4 , this specific embodiment includes a dividing head positioning part, an adjustable fixed clamping part and a support table 4. The dividing head positioning part and the adjustable fixed clamping part are arranged on the support table 4, and the positions of the dividing head positioning part and the adjustable fixed clamping part on the support table 4 are set as adjustable structures to adapt to workpieces of different lengths; the dividing head positioning part includes a dividing head 2 and a chuck 3, the chuck 3 is installed at the front end of the dividing head 2, and the chuck 3 has a plurality of claws 3-1 to form a grasping and positioning structure; the adjustable fixed clamping part includes a bottom plate 1, an adjustable clamping structure 6 and a height adjusting structure 7. The bottom plate 1 is connected to the bottom plate 1 through a plurality of bolts to form a position-adjustable connection structure. The adjustable clamping structure 6 and the height adjusting structure 7 are fixedly connected to the bottom plate 1. The adjustable clamping structure 6 is a left-right tightening and adjusting type clamping structure to position and clamp the workpiece, and the height adjusting structure 7 constitutes an up-down height adjusting type adjusting structure to keep the workpiece flat.

[0024] In this embodiment:

[0025] The adjustable clamping structure 6 is composed of a left tightening adjustment unit 6-1 and a right tightening adjustment unit 6-2. The left tightening adjustment unit 6-1 and the right tightening adjustment unit 6-2 are connected to the bottom plate 1 through bolts to form a position-adjustable connection structure; the height adjusting structure 7 is composed of an "L" shaped part 7-1, a height adjusting bolt 7-2 and an "L" shaped part fastening bolt 7-3, an upper slider 7-4 and a lower slider 7-5. The "L" shaped part 7-1 is connected to the bottom plate 1 through the "L" shaped part fastening bolt 7-3. The upper slider 7-4 is movably clamped on the left tightening adjustment unit 6-1 and the right tightening adjustment unit 6-2 to form an up-down sliding connection structure. The connection between the upper slider 7-4 and the lower slider 7-5 is a complementary inclined plane connection. The height adjusting bolt 7-2 passes through the "L" shaped part 7-1 and is movably connected to the lower slider 7-5 to form a lifting drive connection structure.

[0026] The left fastening and adjusting unit 6-1 is composed of a left "L"-shaped column 6-1-1 and a left fastening and adjusting bolt 6-1-2, and the right fastening and adjusting unit 6-2 is composed of a right "L"-shaped column 6-2-1 and a right fastening and adjusting bolt 6-2-2; the left fastening and adjusting bolt 6-1-2 is screwed on the left fastening and adjusting unit 6-1, and the right fastening and adjusting bolt 6-2-2 is screwed on the right fastening and adjusting unit 6-2 to form a spiral fastening structure; the left "L"-shaped column 6-1-1 and the right "L"-shaped column 6-2-1 are fixed on the bottom plate; a left groove is provided on the inner side of the lower part of the left "L"-shaped column 6-1-1, and a right groove is provided on the inner side of the lower part of the middle "L"-shaped column 6-2-1. Vertical strip-shaped protrusions are provided on the left and right sides of the upper slider 6-4, and the size and shape of the vertical strip-shaped protrusions correspond to those of the left groove and the right groove to form a fitting sliding connection structure.

[0027] A limiting piece 7-6 is provided on the left fastening and adjusting unit 6-1 or the right fastening and adjusting unit 6-2, and an upper slider rising limiting member 7-7 is provided on the upper slider 7-4 corresponding to the limiting piece 7-6 to limit the rising height of the upper slider 7-4.

[0028] A number of inverted "T"-shaped grooves 4-1 are provided on the support table 4, and the bottom plate 1 and the dividing head 2 are bolted to the "T"-shaped grooves 4-1 to form a position-adjustable connection structure.

[0029] A dividing turntable 2-1 is provided in the dividing head. The power output end of the dividing turntable 2-1 is connected to the drive input end of the chuck 3 to drive the chuck 3 to rotate clockwise or counterclockwise, so as to adjust the indexing position of the gripper 3-1 so that the gripper 3-1 accurately catches the concave position of the workpiece. The connection between the power output end of the dividing turntable 2-1 and the drive input end of the chuck 3 can be a mechanical connection structure of conventional technology.

[0030] In this embodiment, when the machine tool 10 performs machining, one end of the workpiece 5 is fixed and clamped by the dividing head 2, and the other end is placed on the adjustable clamping structure 6, and then the height adjusting structure 7 (bolt) is rotated to adjust the height of the workpiece 5. After the workpiece 5 is kept horizontal, the workpiece 5 is fixed and locked with the left fastening and adjusting bolt 6-1-2 and the right fastening and adjusting bolt 6-2-2.

[0031] The dividing head positioning part and the adjustable fixed clamping part are bolted to the support table 4. Since it is a bolt connection, the distance between the two can be adjusted according to the length of the workpiece.

[0032] The contact surfaces of the upper and lower sliders in the adjustable fixed clamping part are inclined planes. The height adjusting nut can be rotated to move the lower slider back and forth, and then drive the upper slider to slide up and down, so as to adjust the height.

[0033] The left fastening adjustment bolt 6-1-2 and the right fastening adjustment bolt 6-2-2 in the adjustable fixed clamping part are workpiece fixing bolts, which can fix workpieces with different diameters.

[0034] The limit piece 7-6 in the adjustable fixed clamping part can limit the excessive rise of the upper slide block.

[0035] Before machining in this embodiment, first install the claw chuck 3 on the dividing head 2, and install the adjustable fixed clamping part according to Figure 3 , Figure 4 Installed. According to the length of the workpiece 5, adjust the distance between the dividing head positioning part and the adjustable fixed clamping part. Use the adjustable fixture fixing bolt 1-1 and the dividing head fixing bolt 2-2 to fix the adjustable fixed clamping part and the dividing head positioning part on the support table 4 respectively, and the support table 4 is installed on the working platform 10-1 of the machine tool 10. Clamp and fix one end of the workpiece 5 with the claw chuck 3, and place the other end in the groove of the upper slide block 7-4. Rotate the height adjustment bolt 7-2 to drive the lower slide block 7-5 to move back and forth, so that the upper slide block 7-4 moves up and down until the workpiece 5 is horizontal. Rotate the left fastening adjustment bolt 6-1-2 and the right fastening adjustment bolt 6-2-2 (workpiece fixing bolts) to completely fix and lock the workpiece 5, which is convenient for subsequent machining operations such as drilling and milling slots on the workpiece 5 by the machine head 10-2 of the machine tool 10.

[0036] Other specific embodiments:

[0037] The characteristics of other specific embodiments of the present invention are:

[0038] The indexing adjustment turntable 2-1 can be omitted. Or omit the upper slide block elevation limiting part 7-7 and the limit piece 7-6. The rest is the same as specific embodiment 1.

[0039] The present invention is applicable to the clamping of heavy long shaft rod workpieces of various sizes, with high applicability and simple and convenient operation.

[0040] The present invention clamps the workpiece more firmly and tightly, with simple and fast clamping, can realize the clamping of long shaft rod workpieces of various sizes, is convenient for horizontal adjustment, reduces the time for replacing the tooling fixture back and forth, and improves work efficiency.

[0041] 3. By adjusting the distance between the dividing head fixing part and the adjustable clamping part, the present invention can be applicable to long shaft rod workpieces of different lengths, and has the characteristics of high versatility, time saving (the time for replacing the tooling back and forth), and high efficiency.

[0042] ⑵ One end of the workpiece is clamped on the dividing head through a chuck, and the other end is fixed on the adjustable clamping fixture, with stable, firm and simple clamping operation.

[0043] ⑶ In the second part, the upper slider can be driven by the height adjustment nut to slide up and down, so as to quickly adjust the height of one end of the workpiece and quickly level the workpiece.

[0044] ⑷ The adjustable fixed clamping tooling can clamp long shaft rod workpieces with different diameters, has high applicability, has a wide range of application scenarios, and has a high utilization rate of the tooling.

Claims

1. An adjustable fixture for processing heavy long shaft rods, characterized in that: It includes a dividing head positioning part, an adjustable fixed clamping part and a support table (4). The dividing head positioning part and the adjustable fixed clamping part are arranged on the support table (4), and the positions of the dividing head positioning part and the adjustable fixed clamping part on the support table (4) are set as adjustable structures to adapt to workpieces of different lengths; the dividing head positioning part includes a dividing head (2) and a chuck (3), the chuck (3) is installed at the front end of the dividing head (2), and there are several claws (3-1) in the chuck (3) to form a clamping and positioning structure; the adjustable fixed clamping part includes a bottom plate (1), an adjustable clamping structure (6) and a height adjustment structure (7). The bottom plate (1) is connected to the bottom plate (1) by several bolts to form a position-adjustable connection structure. The adjustable clamping structure (6) and the height adjustment structure (7) are fixedly connected to the bottom plate (1). The adjustable clamping structure (6) is a left-right tightening and adjusting type clamping structure to position and clamp the workpiece, and the height adjustment structure (7) constitutes an up-down height adjustment type adjustment structure to keep the workpiece straight.

2. The adjustable fixture for processing heavy long shaft rods according to claim 1, characterized in that: The adjustable clamping structure (6) is composed of a left tightening adjustment unit (6-1) and a right tightening adjustment unit (6-2). The left tightening adjustment unit (6-1) and the right tightening adjustment unit (6-2) are connected to the bottom plate (1) by bolts to form a position-adjustable connection structure; the height adjustment structure 7 is composed of an "L" shaped part (7-1), a height adjustment bolt (7-2), an "L" shaped part fastening bolt (7-3), an upper slider (7-4) and a lower slider (7-5). The "L" shaped part (7-1) is connected to the bottom plate (1) by the "L" shaped part fastening bolt (7-3). The upper slider (7-4) is movably clamped on the left tightening adjustment unit (6-1) and the right tightening adjustment unit (6-2) to form an up-down sliding connection structure. The connection between the upper slider (7-4) and the lower slider (7-5) is a complementary inclined plane connection. The height adjustment bolt (7-2) passes through the "L" shaped part (7-1) and is movably connected to the lower slider (7-5) to form a lifting drive connection structure.

3. The adjustable fixture for processing heavy long shaft rods according to claim 2, characterized in that: The left tightening adjustment unit (6-1) is composed of a left "L" shaped column (6-1-1) and a left tightening adjustment bolt (6-1-2). The right tightening adjustment unit (6-2) is composed of a right "L" shaped column (6-2-1) and a right tightening adjustment bolt (6-2-2); the left tightening adjustment bolt (6-1-2) is screwed on the left tightening adjustment unit (6-1), and the right tightening adjustment bolt (6-2-2) is screwed on the right tightening adjustment unit (6-2) to form a spiral tightening structure; the left "L" shaped column (6-1-1) and the right "L" shaped column (6-2-1) are fixed on the bottom plate; a left groove is provided on the inner side of the lower part of the left "L" shaped column (6-1-1), and a right groove is provided on the inner side of the lower part of the middle "L" shaped column (6-2-1). Vertical strip-shaped protrusions are provided on the left and right sides of the upper slider (6-4), and the size and shape of the vertical strip-shaped protrusions correspond to those of the left groove and the right groove to form a matching sliding connection structure.

4. The adjustable fixture for processing heavy long shaft rods according to claim 2 or 3, characterized in that: A limit piece (7-6) is provided on the left fastening adjustment unit (6-1) or the right fastening adjustment unit (6-2), and a slider elevation limiter (7-7) is provided on the upper slider (7-4) corresponding to the limit piece (7-6) to limit the rising height of the upper slider (7-4).

5. The adjustable fixture for processing heavy long shaft rods according to claim 4, characterized in that: A number of inverted "T"-shaped grooves (4-1) are provided on the support table (4), and the bottom plate (1) and the dividing head (2) are connected by bolts in the "T"-shaped grooves (4-1) to form a position-adjustable connection structure.

6. The adjustable fixture for processing heavy long shaft rods according to claim 4, characterized in that: A dividing turntable (2-1) is provided in the dividing head, and the power output end of the dividing turntable (2-1) is connected to the drive input end of the claw disc (3) to drive the claw disc (3) to rotate clockwise or counterclockwise, so as to adjust the indexing position of the claw (3-1) so that the claw (3-1) accurately clamps the concave position of the workpiece.

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