CN115971918A - Thin-wall shell multi-hole machining tool clamp and machining method - Google Patents
Thin-wall shell multi-hole machining tool clamp and machining method Download PDFInfo
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- CN115971918A CN115971918A CN202211490025.5A CN202211490025A CN115971918A CN 115971918 A CN115971918 A CN 115971918A CN 202211490025 A CN202211490025 A CN 202211490025A CN 115971918 A CN115971918 A CN 115971918A
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Abstract
The invention discloses a multi-hole machining tool clamp and a machining method for a thin-wall shell, wherein the clamp comprises a mandrel base, a gland, a bolt and the thin-wall shell; the mandrel base is coaxially arranged on the rotary worktable of the machine tool, and the top of the mandrel base is provided with a threaded hole; the thin-wall shell is sleeved outside the upper end of the mandrel base and provided with a central inner hole with a through upper end and a through lower end; a gland is sleeved in the opening at the upper end of the thin-wall shell, and an axle center slotted hole communicated with the outside is formed in the gland; the bolt penetrates through the axial center slotted hole of the gland and the central inner hole of the thin-wall shell until the lower end thread of the bolt is screwed into the threaded hole of the mandrel base, and the head end face of the bolt is fastened and pressed on the gland to tightly fix the thin-wall shell on the mandrel base. The tool clamp and the processing method for processing the multiple holes in the thin-wall shell have the advantages that the clamping is convenient and fast; the whole machining process only needs one-time clamping, and errors brought to machining precision by datum transformation are reduced.
Description
Technical Field
The invention relates to a tool clamp, in particular to a tool clamp and a machining method for machining multiple holes in a thin-wall shell.
Background
The shell is a thin-wall container or a thin pipe, and the cutting force required during processing is small. In order to meet the assembly and use requirements, axial or radial circular holes or waist-shaped holes and the like with different sizes are processed on the bearing. The traditional processing method is completed by a milling machine or a drilling machine in multiple working procedures and multiple steps. However, when the requirement on the machining size precision or position precision of each hole is high, the traditional machining method needs to clamp for many times, the change of the reference can bring errors to the machining precision, the product quality is difficult to ensure, and the rejection rate is not low; when the thin-wall shell is replaced, the clamping speed is low, the production efficiency needs to be improved, and the machining efficiency is low.
Disclosure of Invention
In view of this, the invention provides a tool clamp and a machining method for machining a plurality of holes in a thin-wall shell.
In order to achieve the purpose, the invention adopts the following technical scheme:
a porous processing frock clamp of thin-wall shell and processing method, including spindle base, gland, bolt and thin-wall shell; the mandrel base is coaxially arranged on a rotary worktable of the machine tool, and the top of the mandrel base is provided with a threaded hole; the thin-wall shell is sleeved outside the upper end of the mandrel base and provided with a central inner hole with a through upper end and a through lower end; a gland is sleeved in an opening at the upper end of the thin-wall shell and is in a cross disc cover shape, and an axis slotted hole communicated with the outside is formed in the gland; the bolt penetrates through an axle center slotted hole of the pressing cover and a central inner hole of the thin-wall shell until the lower end thread of the bolt is screwed into the threaded hole of the mandrel base, and the head end face of the bolt is fastened and pressed on the pressing cover to tightly fix the thin-wall shell on the mandrel base.
Preferably, the mandrel base is of a hollow stepped shaft structure, and the hollow stepped shaft structure is formed by a lower section large flange, a middle section transition support cylinder and an upper section mandrel small cylinder, wherein the outer diameters of the lower section large flange, the middle section transition support cylinder and the upper section mandrel small cylinder are sequentially reduced; the bottom surface of the large flange is a positioning reference surface, and the lower section of the large flange is arranged on a rotary worktable of the machine tool; a threaded hole is formed in the center of the small core shaft cylinder; the thin-wall shell is sleeved on the cylindrical surface of the small cylinder of the mandrel in a matching manner through the central inner hole of the thin-wall shell.
Preferably, the cylindrical surface of the small cylinder of the mandrel is perpendicular to the bottom surface of the large flange, and the shaft shoulder end surface of the small cylinder of the mandrel is parallel to the bottom surface of the large flange.
Preferably, the bottom surface of the large flange is provided with a large counter bore.
Preferably, the upper section of the excircle of the gland is a cylindrical surface, the lower section of the excircle of the gland is a conical surface, and the outer diameter of the cylindrical surface of the gland is larger than that of the conical surface of the gland to form a flange; and the flange of the gland is covered on the upper end opening of the thin-wall shell.
The invention also provides a processing method of the thin-wall shell multi-hole processing tool clamp, which comprises the following steps,
s1: when the clamping is carried out for the first time, the mandrel base is arranged on a rotary worktable of a machine tool, so that the mandrel base and the rotary worktable are coaxial; sleeving the thin-wall shell into a small mandrel cylinder of the mandrel base, slightly rotating to enable the thin-wall shell to be assembled in place, and attaching the bottom surface of the thin-wall shell to the end surface of a shaft shoulder of the small mandrel cylinder; then, a gland cover is arranged at the upper end of the thin-wall shell, then a bolt sequentially penetrates through an axle center slotted hole of the gland cover and a central inner hole of the thin-wall shell until a lower end thread of the bolt is screwed into a threaded hole of the mandrel base, and the bolt is screwed to enable the thin-wall shell to be fastened on the mandrel base;
s2: processing on a five-axis horizontal processing center; after the thin-wall shell is clamped, adjusting the position of a cutter arranged on a main shaft of a machine tool to process 3 radial uniformly distributed kidney-shaped groove c holes of the thin-wall shell; when the hole c of the first kidney-shaped groove is processed, the workbench rotates by 120 degrees around the central axis of the workbench to process a second hole, and sequentially processes a third hole;
s3: after the c-shaped slot is processed, the cutter is replaced, and the position of the cutter is adjusted to process 4 uniformly distributed radial b-shaped holes of the thin-wall shell; after the first radial hole b is processed, the workbench rotates by 90 degrees around the central axis of the workbench to process a second hole, and a third hole and a fourth hole are processed in sequence;
s4: when all the radial holes are processed, the working table drives the tool clamp and the thin-wall shell to radially and clockwise rotate by 90 degrees towards the main shaft direction to process 4 uniformly distributed axial holes a of the thin-wall shell; changing a cutter, adjusting the position of the cutter according to the requirement of a drawing to process a first a hole, rotating a workbench by 90 degrees around a central axis of the workbench to process a second hole after the first a hole is processed, and sequentially processing a third hole and a fourth hole; when all the axial holes are processed, the workbench drives the tool clamp and the thin-wall shell to rotate anticlockwise in the radial direction by 90 degrees and returns to the initial position;
s5: at the moment, all holes are machined, the bolts are unscrewed to proper positions without separating from the mandrel base, the gland is drawn out from the side face, and the thin-walled shell is quickly taken out from the side face. When the thin-wall shell is clamped for the second time, the thin-wall shell is firstly sleeved on a small mandrel cylinder of the mandrel base from the top, the gland is inserted into the upper end of the thin-wall shell from the side surface of the mandrel slot, and the bolt is screwed tightly, so that the thin-wall shell can be quickly installed; the steps are repeated in sequence, and batch production can be realized.
Compared with the prior art, the invention has the beneficial effects that:
(1) The whole device is innovative in design, convenient and quick to clamp, high in production efficiency and suitable for batch production;
(2) The whole machining process only needs one-time clamping, so that errors brought to machining precision by datum transformation are reduced; the device has reasonable design of the processing precision and the assembly precision of each positioning element, and well ensures the processing quality of products.
Drawings
FIG. 1 is an overall front view of the present invention;
FIG. 2 is a front view of the spindle base of the present invention;
FIG. 3 is a front view of the gland of the present invention;
FIG. 4 is a top view of the gland of the present invention;
fig. 5 is a schematic view of the thin-walled housing structure of the present invention.
In the figure: 1. a mandrel base; 11. a large flange; 12. a transition support cylinder; 13. a mandrel small cylinder; 14. a threaded hole; 2. a gland; 21. a flange; 22. an axial slotted hole; 3. a bolt; 4. a thin-walled housing.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example (b):
as shown in fig. 1-5, the device mainly comprises a mandrel base 1, a gland 2, a bolt 3 and a thin-wall shell 4. The mandrel base 1 is coaxially installed on a rotary worktable of a machine tool, a central inner hole of the thin-wall shell 4 is sleeved on a small mandrel cylinder 13 of the mandrel base 1 in a clearance fit mode, a flange 21 of the gland 2 covers the top opening of the thin-wall shell 4, the bolt 3 penetrates through an axle center slotted hole of the gland 2 and the central inner hole of the thin-wall shell 4 until the lower end of the bolt 3 is screwed into a central threaded hole 14 in the upper end of the mandrel base 1, and the end face of the head of the bolt 3 presses the gland 2 to move downwards so as to fasten the thin-wall shell 4 on the mandrel base 1.
The mandrel base 1 is a hollow stepped shaft, and the mandrel base 1 is sequentially provided with a large flange 11, a transition support cylinder 12 and a mandrel small cylinder 13, wherein the outer diameter of the large flange is gradually reduced from bottom to top. The large flange 11 is formed by the large end with a larger diameter and a thinner diameter, and the bottom surface of the large flange 11 is used as a positioning reference surface of the whole device, has high processing precision and is used for installing a workbench. The middle section is a transition support cylinder 12. The cylindrical surface and the shaft shoulder end surface of the upper section mandrel small cylinder 13 are used as positioning surfaces of the thin-wall shell 4, the cylindrical surface of the mandrel small cylinder 13 is designed with a verticality requirement on a positioning reference surface and a parallelism requirement of the shaft shoulder end surface on the positioning reference surface, and the dimensional processing precision is high. The cylindrical surface of the small core shaft cylinder 13 is matched with the inner hole of the thin-wall shell 4 by a small clearance to guide the thin-wall shell 4, so that the processing precision of each hole of the thin-wall shell 4 can be well ensured. A tool withdrawal groove is formed in the shaft shoulder of the small mandrel cylinder 13, so that interference between corners and edges of the shell can be avoided; the edge of the intersection of the upper end surface of the small cylinder 13 of the mandrel and the small cylindrical surface is designed to be a lengthening chamfer so as to be convenient for quick introduction when the thin-wall shell 4 is clamped. The inner hole of the mandrel base 1 is a step through hole. The bottom surface of the large flange 11 is provided with a large counter bore with a larger diameter and a shallower height, so that the contact surface with a rotary worktable of a machine tool can be reduced, the clamping is more stable, the grinding range of the contact surface can be reduced, and the processing cost is saved. The middle large round hole of the transition support cylinder 12 is used for reducing weight. The top threaded hole 14 of the mandrel small cylinder 13 is used for connection when the bolt 3 presses the thin-wall shell 4 tightly.
The gland 2 is a cross disc cover-shaped part, 4 notches are uniformly milled on the gland 2 to avoid a cutter for facilitating the processing of 4 axially uniformly distributed holes on the conical surface of the thin-wall shell 4, one notch is radially milled to the axis to form an axis slotted hole 22, and the size of the axis slotted hole 22 is slightly larger than the diameter of a bolt passing through the notch. Due to the design of the notch and the axial center slotted hole 22, when the thin-wall shell 4 and the gland 2 are assembled and disassembled, the bolt 3 does not need to be taken out of the base, only part of the length of the bolt 3 needs to be withdrawn enough for the gland 2 to be drawn out from the side face of the thin-wall shell 4, the aligning time when the bolt 3 is screwed into the base is saved, and the clamping speed is improved. The upper section of the excircle of the gland 2 is a cylindrical surface, the lower section of the excircle of the gland 2 is a conical surface, the outer diameter of the cylindrical surface of the gland 2 is larger than that of the conical surface of the gland to form a flange 21, and the design is convenient for the lower part of the gland 2 to be quickly inserted into the thin-wall shell 4 to realize automatic guiding. When the bolt 3 is tightened, the flange 21 of the gland 2 presses the upper end surface of the thin-wall shell 4 to firmly fasten the thin-wall shell 4 on the mandrel base 1, thereby realizing the clamping of the thin-wall shell 4.
As shown in fig. 5, in the thin-wall shell 4, a is 4 axial uniform distribution holes to be processed, b is 4 radial uniform distribution holes to be processed, and c is 3 radial uniform distribution kidney-shaped holes to be processed.
The invention also provides a processing method of the thin-wall shell multi-hole processing tool clamp, which comprises the following steps,
s1: when clamping for the first time, the mandrel base 1 is arranged on a rotary worktable of a machine tool, so that the mandrel base 1 and the rotary worktable are coaxial; sleeving the thin-wall shell 4 into the small mandrel cylinder 13 of the mandrel base 1, slightly rotating to enable the thin-wall shell 4 to be assembled in place, and attaching the bottom surface of the thin-wall shell 4 to the end surface of the shaft shoulder of the small mandrel cylinder 13; then, the gland 2 is covered on the upper end of the thin-wall shell 4, then the bolt 3 sequentially penetrates through the axial center slotted hole 22 of the gland 2 and the central inner hole of the thin-wall shell 4 until the lower end thread of the bolt 3 is screwed into the threaded hole 14 of the mandrel base 1, and the bolt 3 is screwed to ensure that the thin-wall shell 4 is tightly fixed on the mandrel base 1;
s2: processing on a five-axis horizontal processing center; after the thin-wall shell 4 is clamped, adjusting the position of a cutter arranged on a machine tool main shaft to process 3 radial uniformly distributed kidney-shaped groove c holes of the thin-wall shell 4; after the hole c of the first kidney-shaped groove is processed, the workbench rotates by 120 degrees around the central axis of the workbench to process a second hole, and sequentially processes a third hole;
s3: after the c-shaped slot is processed, the cutter is replaced, and the position of the cutter is adjusted to process 4 uniformly distributed radial b-shaped holes of the thin-wall shell 4; after the first radial hole b is processed, the workbench rotates by 90 degrees around the central axis of the workbench to process a second hole, and a third hole and a fourth hole are processed in sequence;
s4: when all the radial holes are processed, the working table drives the tool clamp and the thin-wall shell 4 to radially and clockwise rotate by 90 degrees towards the main shaft direction to process 4 uniformly distributed axial holes a of the thin-wall shell 4; changing a cutter, adjusting the position of the cutter according to the requirement of a drawing to process a first hole a, rotating a workbench by 90 degrees around the central axis of the workbench to process a second hole after the first hole a is processed, and sequentially processing a third hole and a fourth hole; when all the axial holes are processed, the workbench drives the tool clamp and the thin-wall shell 4 to rotate counterclockwise in the radial direction by 90 degrees and returns to the initial position;
s5: at this time, all holes are machined, the bolts 3 are loosened to the proper positions without being separated from the mandrel base 1, the gland 2 is pulled out from the side, and the thin-walled shell 4 is quickly taken out. When the thin-wall shell is clamped for the second time, the thin-wall shell is firstly sleeved on the small mandrel cylinder 13 of the mandrel base 1 from the top, the gland 2 is inserted into the upper end of the thin-wall shell 4 from the side surface of the mandrel slot hole 22, and the bolt 3 is screwed tightly, so that the thin-wall shell can be quickly installed; the steps are repeated in sequence, and batch production can be realized.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered as the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (6)
1. A porous machining tool clamp for a thin-wall shell and a machining method are disclosed, wherein the tool clamp comprises a mandrel base (1), a gland (2), a bolt (3) and a thin-wall shell (4); the spindle is characterized in that the spindle base (1) is coaxially arranged on a rotary worktable of a machine tool, and a threaded hole (14) is formed in the top of the spindle base (1); the thin-wall shell (4) is sleeved outside the upper end of the mandrel base (1), and the thin-wall shell (4) is provided with a central inner hole with a through upper end and a through lower end; a gland (2) is sleeved in an opening at the upper end of the thin-wall shell (4), the gland (2) is in a cross disc cover shape, and an axis slotted hole (22) communicated with the outside is formed in the gland (2); the bolt (3) penetrates through an axle center slotted hole (22) of the gland (2) and a central inner hole of the thin-wall shell (4) until the lower end of the bolt (3) is screwed into a threaded hole (14) of the mandrel base (1), and the head end face of the bolt (3) is fastened and pressed on the gland (2) to tightly fix the thin-wall shell (4) on the mandrel base (1).
2. The tool clamp for machining the multiple holes in the thin-wall shell according to claim 1, wherein the mandrel base (1) is of a hollow stepped shaft structure, and the hollow stepped shaft structure is formed by a lower section large flange (11), a middle section transition support cylinder (12) and an upper section mandrel small cylinder (13) of which the outer diameters are sequentially reduced; the bottom surface of the large flange (11) is a positioning reference surface, and the lower section of the large flange (11) is arranged on a rotary worktable of the machine tool; a threaded hole (14) is formed in the center of the small mandrel cylinder (13); the thin-wall shell (4) is sleeved on the cylindrical surface of the small mandrel cylinder (13) through the central inner hole in a matching manner.
3. The thin-wall shell multi-hole machining tool clamp according to claim 2 is characterized in that the cylindrical surface of the mandrel small cylinder (13) is perpendicular to the bottom surface of the large flange (11), and the shaft shoulder end surface of the mandrel small cylinder (13) is parallel to the bottom surface of the large flange (11).
4. The thin-wall shell multihole processing tool clamp according to claim 2, wherein a large counter bore is formed in the bottom surface of the large flange (11).
5. The tool clamp for machining the multiple holes in the thin-wall shell according to claim 1, characterized in that the upper section of the excircle of the gland (2) is a cylindrical surface, the lower section of the excircle of the gland is a conical surface, and the outer diameter of the cylindrical surface of the gland (2) is larger than that of the conical surface of the gland to form a flange (21); and a flange (21) of the gland (2) is covered on an upper end opening of the thin-wall shell (4).
6. The machining method of the thin-wall shell multi-hole machining tool clamp is characterized by comprising the following steps of,
s1: when the spindle base (1) is clamped for the first time, the spindle base (1) is arranged on a rotary worktable of a machine tool, and the spindle base (1) is coaxial with the rotary worktable; sleeving the thin-wall shell (4) into a small mandrel cylinder (13) of the mandrel base (1), slightly rotating to enable the thin-wall shell (4) to be assembled in place, and attaching the bottom surface of the thin-wall shell (4) to the end surface of a shaft shoulder of the small mandrel cylinder (13); then, a gland (2) is covered on the upper end of the thin-wall shell (4), then a bolt (3) sequentially penetrates through an axle center slotted hole (22) of the gland (2) and a central inner hole of the thin-wall shell (4) until the lower end thread of the bolt (3) is screwed into a threaded hole (14) of the mandrel base (1), and the bolt (3) is screwed to enable the thin-wall shell (4) to be fastened on the mandrel base (1);
s2: processing on a five-axis horizontal processing center; after the thin-wall shell (4) is clamped, adjusting the position of a cutter arranged on a machine tool main shaft to process 3 radial uniformly-distributed kidney-shaped groove c holes of the thin-wall shell (4); after the hole c of the first kidney-shaped groove is processed, the workbench rotates by 120 degrees around the central axis of the workbench to process a second hole, and sequentially processes a third hole;
s3: after the c-shaped slot is processed, the cutter is replaced, and the position of the cutter is adjusted to process 4 uniformly distributed radial b-shaped holes of the thin-wall shell (4); after the first radial hole b is processed, the workbench rotates by 90 degrees around the central axis of the workbench to process a second hole, and a third hole and a fourth hole are processed in sequence;
s4: when all the radial holes are processed, the working table drives the tool clamp and the thin-wall shell (4) to radially and clockwise rotate for 90 degrees towards the main shaft direction to process 4 uniformly distributed axial holes a of the thin-wall shell (4); changing a cutter, adjusting the position of the cutter according to the requirement of a drawing to process a first hole a, rotating a workbench by 90 degrees around the central axis of the workbench to process a second hole after the first hole a is processed, and sequentially processing a third hole and a fourth hole; when all the axial holes are processed, the workbench drives the tool clamp and the thin-wall shell (4) to rotate counterclockwise in the radial direction by 90 degrees and returns to the initial position;
s5: at the moment, all holes are machined, the bolts (3) are unscrewed to a proper position without being separated from the mandrel base (1), the gland (2) is pulled out from the side, and the thin-wall shell (4) is quickly taken out. When the thin-wall shell is clamped for the second time, the thin-wall shell is firstly sleeved on a small mandrel cylinder (13) of the mandrel base (1) from the top, the gland (2) is inserted from the side face of the mandrel slotted hole (22) to cover the upper end of the thin-wall shell (4), and the bolt (3) is screwed, so that the thin-wall shell can be quickly installed; the steps are repeated in sequence, and batch production can be realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211490025.5A CN115971918A (en) | 2022-11-25 | 2022-11-25 | Thin-wall shell multi-hole machining tool clamp and machining method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211490025.5A CN115971918A (en) | 2022-11-25 | 2022-11-25 | Thin-wall shell multi-hole machining tool clamp and machining method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115971918A true CN115971918A (en) | 2023-04-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211490025.5A Pending CN115971918A (en) | 2022-11-25 | 2022-11-25 | Thin-wall shell multi-hole machining tool clamp and machining method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115971918A (en) |
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- 2022-11-25 CN CN202211490025.5A patent/CN115971918A/en active Pending
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