Cylindrical workpiece drilling clamp and special drilling machine tool comprising same

Abstract

The invention provides a tubular workpiece drilling clamp. The tubular workpiece drilling clamp comprises a rotary base, a rotary driving mechanism, a clamping mechanism and a pressing device. The rotary base comprises a base body and an inner lifting device, the base body is fixedly connected with the output end of the rotary driving mechanism, and the inner lifting device is arranged in the base body; the lower clamping assembly is installed at the top of the rotating base and used for supporting the end face of a second end section body in the cylindrical workpiece, and the upper clamping assembly is connected to the output end of the inner lifting device and used for supporting a first step in the cylindrical workpiece; the downward pressing device comprises a base and a downward pressing mechanism, and the downward pressing mechanism is used for pressing and supporting the end face of the first end section body in the cylindrical workpiece. According to the tubular workpiece drilling clamp, the tubular workpiece is clamped through the clamping assembly, and the problem that the production quality of the tubular workpiece is reduced due to the fact that the tubular workpiece cannot be positioned and cannot be accurately drilled in the tubular workpiece drilling process is well solved.

Description

Technical Field

[0001] The invention relates to the field of drilling machine tools, and in particular to a cylindrical workpiece drilling fixture and a special drilling machine tool comprising the same. Background Art

[0002] like Figure 3 As shown, the cylindrical workpiece includes: a cylindrical body, the cylindrical body is a hollow cylindrical structure, the cylindrical body includes: a first end section, a second end section and an intermediate section, the intermediate section is a hollow frustum structure, the small end of the intermediate section is connected to the first end section, the large end of the intermediate section is connected to the second end section, a first step is formed at the connection between the first end section and the intermediate section, the inner wall of the small end of the intermediate section protrudes to form a first protruding rib, the first protruding rib is located next to the first step, a second step is formed at the connection between the second end section and the intermediate section, the inner wall of the second end section protrudes to form a second protruding rib, the second protruding rib is located next to the second step.

[0003] A Chinese patent discloses a special POT drilling machine tool with application number CN202323359974.2, which includes: a bed, which is the main body of the machine tool, and the bed is arranged as a circular bed structure; a support table, which is equidistantly arranged at the upper end of the bed; a turntable, which is located at the upper end of the bed and vertically installed, and is aligned with the central axis of the support table; a pushing rack is arranged inside the upper end of the support table, and a displacement slide is arranged at the output end of the pushing rack, and the displacement slide is slidably connected to the groove at the upper end of the support table, and a drilling component is installed on the upper end of the displacement slide.

[0004] Although the above-mentioned POT drilling machine tool can realize the drilling operation, the POT drilling machine tool still has the disadvantage that it cannot clamp and position the cylindrical workpiece in the vertical direction, resulting in displacement of the cylindrical workpiece in the vertical direction during the drilling process, resulting in reduced product quality of the cylindrical workpiece after drilling. Summary of the invention

[0005] The present invention aims to provide a cylindrical workpiece drilling fixture and a special drilling machine tool including the same, so as to solve the problem in the prior art that the cylindrical workpiece cannot be clamped and positioned in a vertical direction when drilling a hole in the cylindrical workpiece, resulting in reduced product quality of the cylindrical workpiece.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: the present invention first discloses a cylindrical workpiece drilling fixture, comprising: a rotating base, a rotating drive mechanism, a clamping mechanism and a pressing device; the output end of the rotating drive mechanism is connected to the rotating base; the rotating base comprises: a base body and an internal lifting device, the base body is fixedly connected to the output end of the rotating drive mechanism, and the internal lifting device is installed in the base body; the clamping mechanism comprises: an upper clamping assembly and a lower clamping assembly, the lower clamping assembly is installed on the top of the rotating base, the lower clamping assembly is used to support the end face of the second end section of the cylindrical workpiece, the upper clamping assembly is connected to the output end of the internal lifting device, and the upper clamping assembly is used to support the first step in the cylindrical workpiece; a pressing device is provided next to the rotating drive mechanism, the pressing device comprises: a base and a pressing mechanism, the output end of the pressing mechanism is connected to the upper clamping assembly, and the pressing mechanism is used to press and support the end face of the first end section of the cylindrical workpiece.

[0007] Preferably, the internal lifting device is a hydraulic cylinder, and the output end of the hydraulic cylinder is connected to the lifting rod.

[0008] Preferably, the lower clamping assembly includes: a lower support seat and a guide column. The lower support seat is installed on the top of the hydraulic cylinder housing, the lower support seat supports the end face of the second end section of the cylindrical workpiece, and at least three guide columns are installed on the lower support seat, and all guide columns surround the outside of the second end section of the cylindrical workpiece.

[0009] Preferably, the lower support seat includes: a lower elastic diaphragm and a lower elastic gasket, the lower elastic diaphragm is installed above the lower elastic gasket, the lower elastic diaphragm is used to extend into the gap between two adjacent second protruding ribs in the cylindrical workpiece, and is used to support the second step in the cylindrical workpiece, the lower elastic gasket is installed on the top of the hydraulic cylinder housing, a guide column is installed on the lower elastic gasket, and the lower elastic gasket supports the end face of the second end section in the cylindrical workpiece.

[0010] Preferably, the upper clamping assembly includes: an upper pressure plate and an upper elastic diaphragm, the lifting rod is connected to the upper pressure plate, the upper elastic diaphragm is connected to the upper pressure plate, the upper elastic diaphragm is used to support the first step in the cylindrical workpiece, and the upper elastic diaphragm is used to extend between two adjacent first protruding ribs in the cylindrical workpiece.

[0011] Preferably, the pressing mechanism includes: a pressing cylinder, a limit baffle, a transverse pressure plate, a lower pressure plate and a pressure head assembly. The pressing cylinder is installed above the base. A limit baffle is provided on the side of the lower pressure cylinder facing away from the upper support assembly. The limit baffle is provided with an insertion groove. The lower pressure plate is located above the lower pressure cylinder. One end of the lower pressure plate can extend into the insertion groove of the limit baffle. The other end of the lower pressure plate is connected to the pressure head assembly. The transverse pressure plate is arranged above the lower pressure plate. The output end of the lower pressure cylinder is connected to the lower pressure plate through the transverse pressure plate.

[0012] Preferably, the ram assembly comprises: a ram body and a universal joint, the ram body is rotatably connected to the lower pressing plate via the universal joint, and the ram body is used to press the end face of the first end section of the cylindrical workpiece.

[0013] Preferably, the lifting rod is also connected to a transverse support assembly, and the transverse support assembly is used to support the inner wall of the middle section of the cylindrical workpiece.

[0014] Preferably, the lateral support assembly includes: an auxiliary support head and a support cylinder, the support cylinder is fixed on the lifting rod, the support cylinder is located below the upper clamping assembly, the auxiliary support head is installed on the support cylinder, and the auxiliary support head is used to support the inner wall of the middle section of the cylindrical workpiece.

[0015] The invention also discloses a special drilling machine tool, comprising: the cylindrical workpiece drilling fixture as described above.

[0016] Compared with the prior art, the present invention has the following beneficial effects: the present cylindrical workpiece drilling fixture is provided with a rotating driving mechanism at the bottom to drive the rotating base to rotate, and the rotating base can rotate, thereby driving the positioned cylindrical workpiece to rotate, so that the cylindrical workpiece can rotate during the drilling process, and clamping mechanisms (actually supporting functions) are respectively provided at both ends of the supporting cylinder, and the clamping mechanisms can simultaneously support the first step, the second step and the lower end face of the cylindrical workpiece, and the upper elastic diaphragm and the lower elastic diaphragm respectively extend into the first protruding rib and the second protruding rib, and the pressing device presses the cylindrical workpiece, and the upper elastic diaphragm and the lower elastic diaphragm can prevent the cylindrical workpiece from rotating when being drilled, thereby improving the drilling accuracy and ensuring the production quality of the cylindrical workpiece, and the pressing device presses down the cylindrical workpiece, thereby limiting the vertical jumping of the cylindrical workpiece, avoiding the inaccurate drilling position caused by the jumping of the cylindrical workpiece during the drilling process, and improving the quality of the product.

[0017] Since the cylindrical workpiece has the characteristic of thin wall (the wall thickness of the cylindrical workpiece can be about 1.5mm, of course, it can also be other thicknesses), there are three major types of supports for the inner wall of the cylindrical workpiece. One major type is multi-point support in the horizontal direction, and two major types are annular supports in the vertical direction.

[0018] The principle of multi-point support in the horizontal direction is explained as follows: there are at least three auxiliary support heads, each of which is a support point, so that each drill hole is supported by an auxiliary support head to avoid deformation of the middle part of the cylindrical workpiece when drilling. Four drilling execution devices are arranged around the cylindrical workpiece drilling fixture. When the cylindrical workpiece drilling fixture rotates with the cylindrical workpiece, the drilling positions of the four drilling execution devices change after rotation at a certain angle. Therefore, multiple auxiliary support heads are arranged on the outer wall of the supporting cylinder to ensure that the drill bits of the four drilling execution devices are supported when drilling after the drilling position changes and rotates, so as to avoid deformation of the drilling position.

[0019] The annular support principle in two vertical directions is explained as follows: although there are first and second protruding ribs at the first step and the second step, only the strength beside the first step and the second step is increased, so at the position without the first and second protruding ribs, the cylindrical workpiece has the characteristics of thin wall and easy deformation; in addition, since the cylindrical workpiece is pressed down by the pressing device to be positioned in the vertical direction, the pressing force of the pressing device is strong, and the cylindrical workpiece has the characteristics of thin wall and easy deformation, an upper elastic diaphragm and a lower elastic diaphragm are provided, and the upper elastic diaphragm supports the first step and the gap between the first protruding ribs, so as to avoid the gap between the first step and the pressing device after the pressing device is pressed down. The first end section is compressed and deformed, and the lower elastic diaphragm supports the second step and the gap between the second protruding ribs, that is, the first step and the second step form elastic supports respectively, and after the section between the first step and the second step in the cylindrical workpiece is supported, the section between the first step and the second step in the cylindrical workpiece does not have too much downward pressure, thereby avoiding deformation of the section between the first step and the second step in the cylindrical workpiece, and avoiding compression deformation of the gap between the second protruding ribs. At the same time, the coordinated support of the upper elastic diaphragm and the lower elastic diaphragm makes the thinner middle section of the cylindrical workpiece less stressed, reducing the probability of deformation of the middle section of the cylindrical workpiece, and further ensuring product quality.

[0020] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Cross-sectional view of the drilling fixture for a cylindrical workpiece.

[0022] Figure 2 Schematic diagram of the drilling fixture for cylindrical workpieces.

[0023] Figure 3 Schematic diagram of a cylindrical workpiece.

[0024] Figure numerals: rotating base 1, base body 11, internal lifting device 12, hydraulic cylinder 121, lifting rod 122, rotating drive mechanism 2, clamping mechanism 3, upper clamping assembly 31, upper pressure plate 311, upper elastic diaphragm 312, lower clamping assembly 32, lower support seat 321, lower elastic diaphragm 3211, lower elastic gasket 3212, guide column 322, pressing device 4, base 41, pressing mechanism 42, pressing cylinder 421, limit baffle 422, insertion groove 4221, transverse pressure plate 423, lower pressure plate 424, pressure head assembly 425, pressure head body 4251, universal joint 4252, transverse support assembly 5, auxiliary support head 51, supporting cylinder 52, cylindrical workpiece 6, first step 61, first end section 62, first protruding rib 63, second step 64, second end section 65, second protruding rib 66, middle section 67. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and functions of the present invention clearer and easier to understand, the present invention is further described below in conjunction with the accompanying drawings and specific embodiments: Example 1

[0026] like Figures 1 to 3 As shown, the present invention proposes a cylindrical workpiece drilling fixture, comprising: a rotating base 1, a rotating drive mechanism 2, a clamping mechanism 3 and a pressing device 4; the output end of the rotating drive mechanism 2 is connected to the rotating base 1; the rotating base 1 comprises: a base body 11 and an internal lifting device 12, the base body 11 is fixedly connected to the output end of the rotating drive mechanism 2, and the base body 11 is equipped with the internal lifting device 12; the clamping mechanism 3 comprises: an upper clamping assembly 31 and a lower clamping assembly 32, the lower clamping assembly 32 is installed on the top of the rotating base 1, the lower clamping assembly 32 is used to support the end face of the second end section 65 in the cylindrical workpiece 6, the upper clamping assembly 31 is connected to the output end of the internal lifting device 12, and the upper clamping assembly 31 is used to support the first step 61 in the cylindrical workpiece 6; a pressing device 4 is provided next to the rotating drive mechanism 2, and the pressing device 4 comprises: a base 41 and a pressing mechanism 42, the output end of the pressing mechanism 42 is connected to the upper clamping assembly 31, and the pressing mechanism 42 is used to press and support the end face of the first end section 62 in the cylindrical workpiece 6. When in use, start the rotating drive mechanism 2 to drive the rotating base 1 to rotate, and the internal lifting device 12 adjusts the height of the cylindrical workpiece 6 through the lifting rod 122 to match the position of the puncher. The lower clamping assembly 32 on the rotating base 1 supports the bottom of the cylindrical workpiece 6, and the upper clamping assembly 31 supports the top of the cylindrical workpiece 6. The pressing device 4 presses the top of the cylindrical workpiece 6, so that the clamping assembly clamps the cylindrical workpiece 6 more firmly.

[0027] The inner lifting device 12 is a hydraulic cylinder 121, and the output end of the hydraulic cylinder 121 is connected to a lifting rod 122. The lifting rod 122 is used for the device of the cylindrical workpiece 6 in the vertical direction.

[0028] The lower clamping assembly 32 includes: a lower support seat 321 and a guide column 322. The lower support seat 321 is installed on the top of the housing of the hydraulic cylinder 121. The lower support seat 321 supports the end surface of the second end section 65 of the cylindrical workpiece 6. At least three guide columns 322 are installed on the lower support seat 321, and all guide columns 322 surround the second end section 65 of the cylindrical workpiece 6. When the cylindrical workpiece 6 needs to be lifted, the lower support seat 321 supports the cylindrical workpiece 6, and the guide column 322 is used to guide the position of the cylindrical workpiece 6 to be lifted, so that the cylindrical workpiece 6 is not easily offset during lifting.

[0029] The lower support seat 321 includes: a lower elastic diaphragm 3211 and a lower elastic gasket 3212. The lower elastic diaphragm 3211 is installed above the lower elastic gasket 3212. The lower elastic diaphragm 3211 is used to extend into the gap between two adjacent second protruding ribs 66 in the cylindrical workpiece 6, and is used to support the second step 64 in the cylindrical workpiece 6. The lower elastic gasket 3212 is installed on the top of the hydraulic cylinder 121 housing. The guide column 322 is installed on the lower elastic gasket 3212, and the lower elastic gasket 3212 supports the end surface of the second end section 65 in the cylindrical workpiece 6. The lower elastic gasket 3212 is used to support the bottom of the cylindrical workpiece 6, and the lower elastic diaphragm 3211 supports the second step 64. The lower elastic gasket 3212 and the lower elastic diaphragm 3211 support and stabilize the cylindrical workpiece 6. The lower elastic diaphragm 3211 limits the second protruding rib 66. When the rotating base 1 rotates, the cylindrical workpiece 6 can rotate with the rotating base 1.

[0030] The upper clamping assembly 31 includes: an upper pressing plate 311 and an upper elastic diaphragm 312. The lifting rod 122 is connected to the upper pressing plate 311. The upper elastic diaphragm 312 is connected to the upper pressing plate 311. The upper elastic diaphragm 312 is used to support the first step 61 in the cylindrical workpiece 6, and the upper elastic diaphragm 312 is used to extend between two adjacent first protruding ribs 63 in the cylindrical workpiece 6. When the lifting rod 122 descends, the upper elastic diaphragm 312 on the upper pressing plate 311 is driven to press the first step 61 of the cylindrical workpiece 6. The upper elastic diaphragm 312 is elastic to avoid damage to the cylindrical workpiece 6 during the pressing process.

[0031] The pressing mechanism 42 includes: a pressing cylinder 421, a limit baffle 422, a transverse pressure plate 423, a pressing plate 424 and a pressure head assembly 425. The pressing cylinder 421 is installed above the base 41. A limit baffle 422 is provided on the side of the pressing cylinder 421 away from the upper support assembly. The limit baffle 422 is provided with an insertion groove 4221. The pressing plate 424 is located above the pressing cylinder 421. One end of the pressing plate 424 can extend into the insertion groove 4221 of the limit baffle 422. The other end of the pressing plate 424 is connected to the pressure head assembly 425. The transverse pressure plate 423 is provided above the pressing plate 424. The output end of the pressing cylinder 421 is connected to the pressing plate 424 through the transverse pressure plate 423. When the pressing cylinder 421 is started, the pressing cylinder 421 drives the pressing plate 424 to move downward close to one end of the pressing head assembly 425 , so that the pressing head assembly 425 presses the cylindrical workpiece 6 .

[0032] The pressure head assembly 425 includes: a pressure head body 4251 and a universal joint 4252. The pressure head body 4251 is rotatably connected to the lower pressing plate 424 through the universal joint 4252. The pressure head body 4251 is used to press the end face of the first end section 62 of the cylindrical workpiece 6. When the pressure head body 4251 presses the end face of the first end section 62 of the cylindrical workpiece 6, the universal joint 4252 can adjust the rotation angle of the pressure head body 4251 so that the pressure head body 4251 presses down the end face of the first end section 62 to fit more closely.

[0033] The lifting rod 122 is also connected to a transverse support assembly 5, which is used to support the inner wall of the middle section 67 of the cylindrical workpiece 6. The transverse support assembly 5 supports and positions the inner wall of the middle section of the cylindrical workpiece 6.

[0034] The lateral support assembly 5 includes: an auxiliary support head 51 and a support cylinder 52. The support cylinder 52 is fixed on the lifting rod 122. The support cylinder 52 is located below the upper clamping assembly 31. The auxiliary support head 51 is installed on the support cylinder 52. The auxiliary support head 51 is used to support the inner wall of the middle section 67 in the cylindrical workpiece 6. When in use, the cylindrical workpiece 6 is sleeved outside the support cylinder 52. The auxiliary support head 51 is adjusted in length according to the inner diameter of the cylindrical workpiece 6. The auxiliary support head 51 plays the role of supporting the inner wall of the cylindrical workpiece 6 to prevent the middle section of the cylindrical workpiece 6 from deforming when drilling, thereby further improving the quality of the cylindrical workpiece 6. Example 2

[0035] This embodiment discloses a special drilling machine tool including: the cylindrical workpiece drilling fixture as described in Example 1.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A cylindrical workpiece drilling fixture, characterized in that: include: A rotating base (1), a rotating drive mechanism (2), a clamping mechanism (3) and a pressing device (4); The output end of the rotary drive mechanism (2) is connected to the rotary base (1); The rotating base (1) comprises: a base body (11) and an internal lifting device (12); the base body (11) is fixedly connected to the output end of the rotating drive mechanism (2); and the internal lifting device (12) is installed in the base body (11); The clamping mechanism (3) comprises: an upper clamping assembly (31) and a lower clamping assembly (32), wherein the lower clamping assembly (32) is mounted on the top of the rotating base (1), and the lower clamping assembly (32) is used to support the end surface of the second end section (65) in the cylindrical workpiece (6); the upper clamping assembly (31) is connected to the output end of the inner lifting device (12), and the upper clamping assembly (31) is used to support the first step (61) in the cylindrical workpiece (6); A pressing device (4) is provided next to the rotary drive mechanism (2), the pressing device (4) comprising: a base (41) and a pressing mechanism (42), the output end of the pressing mechanism (42) being connected to the upper clamping assembly (31), the pressing mechanism (42) being used for pressing and supporting the end surface of the first end section (62) in the cylindrical workpiece (6).

2. The cylindrical workpiece drilling fixture according to claim 1, characterized in that: The internal lifting device (12) is a hydraulic cylinder (121), and the output end of the hydraulic cylinder (121) is connected to a lifting rod (122).

3. The cylindrical workpiece drilling fixture according to claim 2, characterized in that: The lower clamping assembly (32) comprises: a lower support seat (321) and a guide column (322). The lower support seat (321) is installed on the top of the hydraulic cylinder (121) housing, and the lower support seat (321) supports the end surface of the second end section (65) in the cylindrical workpiece (6). At least three guide columns (322) are installed on the lower support seat (321), and all the guide columns (322) surround the second end section (65) in the cylindrical workpiece (6).

4. The cylindrical workpiece drilling fixture according to claim 3, characterized in that: The lower support seat (321) comprises: a lower elastic diaphragm (3211) and a lower elastic gasket (3212); the lower elastic diaphragm is mounted above the lower elastic gasket (3212); the lower elastic diaphragm (3211) is used to extend into the gap between two adjacent second protruding ribs (66) in the cylindrical workpiece (6), and is used to support the second step (64) in the cylindrical workpiece (6); the lower elastic gasket (3212) is mounted on the top of the hydraulic cylinder (121) housing; a guide column (322) is mounted on the lower elastic gasket (3212), and the lower elastic gasket (3212) supports the end surface of the second end section (65) in the cylindrical workpiece (6).

5. The cylindrical workpiece drilling fixture according to claim 4, characterized in that: The upper clamping assembly (31) comprises: an upper pressing plate (311) and an upper elastic diaphragm (312); the lifting rod (122) is connected to the upper pressing plate (311); the upper elastic diaphragm (312) is connected to the upper pressing plate (311); the upper elastic diaphragm (312) is used to support the first step (61) in the cylindrical workpiece (6); and the upper elastic diaphragm (312) is used to extend between two adjacent first protruding ribs (63) in the cylindrical workpiece (6).

6. The cylindrical workpiece drilling fixture according to claim 5, characterized in that: The pressing mechanism (42) comprises: a pressing cylinder (421), a limit baffle (422), a transverse pressing plate (423), a pressing plate (424) and a pressing head assembly (425). The pressing cylinder (421) is installed above the base (41). A limit baffle (422) is provided on the side of the pressing cylinder (421) away from the upper supporting assembly. The limit baffle (422) is provided with an insertion groove (4221). The pressing plate (424) is located above the pressing cylinder (421). One end of the pressing plate (424) can extend into the insertion groove (4221) of the limit baffle (422). The other end of the pressing plate (424) is connected to the pressing head assembly (425). The transverse pressing plate (423) is provided above the pressing plate (424). The output end of the pressing cylinder (421) is connected to the pressing plate (424) through the transverse pressing plate (423).

7. The cylindrical workpiece drilling fixture according to claim 6, characterized in that: The pressure head assembly (425) comprises: a pressure head body (4251) and a universal joint (4252); the pressure head body (4251) is rotatably connected to the lower pressure plate (424) via the universal joint (4252); the pressure head body (4251) is used to press the end surface of the first end section (62) in the cylindrical workpiece (6).

8. The cylindrical workpiece drilling fixture according to claim 2, characterized in that: The lifting rod (122) is also connected to a transverse support assembly (5), and the transverse support assembly (5) is used to support the inner wall of the middle section (67) in the cylindrical workpiece (6).

9. The cylindrical workpiece drilling fixture according to claim 8, characterized in that: The transverse support assembly (5) comprises: an auxiliary support head (51) and a support cylinder (52); the support cylinder (52) is fixed on the lifting rod (122); the support cylinder (52) is located below the upper clamping assembly (31); the auxiliary support head (51) is installed on the support cylinder (52); the auxiliary support head (51) is used to support the inner wall of the middle section (67) of the cylindrical workpiece (6).

10. A special machine tool for drilling, characterized in that: include: A cylindrical workpiece drilling fixture as claimed in any one of claims 1 to 9.

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