Part fixing device for turning and milling combined machining center

Abstract

The invention relates to a fixing device, in particular to a part fixing device for a turning and milling combined machining center, which comprises a chuck main body and a fixing base arranged at the bottom end of the chuck main body, and clamping jaws are arranged on the chuck main body at equal intervals; wherein the clamping jaw is connected with the clamping auxiliary mechanism, and the clamping end of the clamping jaw is connected with the cleaning assembly; before a cylindrical part is clamped and fixed through a clamping jaw, auxiliary clamping is conducted through an arranged clamping auxiliary mechanism, namely, a bearing body is pushed through an arranged driving screw till a clamping strip body at one end of the bearing body extends outwards, and then the bearing body is fixed through an arranged clamping positioning assembly; and finally, the clamping strips at the ends of the bearing bodies are driven by the clamping jaws to clamp and fix the cylindrical parts, rust slag on the clamping faces of the clamping strips can be cleaned through the arranged cleaning assembly, operation is convenient, clamping work is stable, and the positive effect on improving the machining quality is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to a fixing device, in particular to a part fixing device for a turning-milling combined machining center. BACKGROUND

[0002] The existing Chinese patent document with publication number CN219986904U discloses a part clamp for a turning-milling combined machining center, which scheme includes a numerical control device, a horizontal moving mechanism, a lifting moving mechanism, a driving device, and a chuck. The lifting moving mechanism is installed on the horizontal moving mechanism, the driving device is installed on the lifting moving mechanism, the output end of the driving device is fixedly connected with the chuck, and the numerical control device is electrically connected with the driving device, the horizontal moving mechanism, and the lifting moving mechanism, respectively. The scheme controls the lifting moving mechanism through the numerical control device, so that the driving device and the chuck installed on the lifting moving mechanism are controlled by the numerical control device, thereby adjusting the height.

[0003] The existing workpiece clamping tool generally clamps through the clamping jaws on the chuck. During the machining process of the parts, some embryo workpieces have rust on the surface. On the one hand, the rust on the embryo part will cause the clamping to be loose, and on the other hand, the rust will adhere to the clamping surface of the clamped workpiece, which will affect the subsequent clamping work and needs to be cleaned in advance, otherwise it will affect the product clamping work and cause damage to the product itself. Therefore, the existing workpiece clamping device lacks a suitable clamping auxiliary assembly to meet its work requirements and needs to be improved and optimized.

[0004] Therefore, the present application provides a part fixing device for a turning-milling combined machining center to solve the above problems. SUMMARY

[0005] The present application aims to provide a part fixing device for a turning-milling combined machining center to solve the problems raised in the background art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a part fixing device for a turning-milling combined machining center, comprising a chuck body and a fixing base arranged at the bottom end of the chuck body, wherein the chuck body is provided with clamping jaws at equal intervals; The clamping jaws clamp the cylindrical parts, and the clamping jaws are connected with the clamping auxiliary mechanism, and the clamping end of the clamping jaws is connected with the cleaning assembly.

[0007] Preferably, the clamping auxiliary mechanism comprises a receiving cavity arranged in the claw, and a mounting groove is arranged at one end of the receiving cavity, a carrier is movably arranged in the receiving cavity, one end of the carrier is embeddedly connected with an auxiliary bearing, the auxiliary bearing is sleeved at one end of a drive screw, the other end of the drive screw extends to the outside of the carrier, and a handle is fixedly arranged at the end, and the other end of the carrier is equidistantly fixedly arranged with a clamping strip.

[0008] Preferably, the end of the clamping strip arranged equidistantly in the bottom row is provided with a connecting threaded cavity, and the connecting threaded cavity is connected with the clamping support assembly.

[0009] Preferably, the carrier is positioned by a clamping positioning assembly arranged, and a cleaning assembly is connected in the mounting groove.

[0010] Preferably, the cleaning assembly comprises a mounting plate, the mounting plate is matched and clamped in the mounting groove, and the mounting plate is fixed by a screw, square grooves are equidistantly arranged in the mounting plate, and connecting bodies are fixedly arranged on the inner side walls of the square grooves.

[0011] Preferably, the square grooves and the clamping strips are arranged in corresponding positions and have the same number of groups; a circular groove is arranged in the connecting body, and cleaning brushes are equidistantly and annularly arranged on the inner side walls of the circular groove, and inclined bristles are arranged at the ends of the cleaning brushes.

[0012] Preferably, the clamping positioning assembly comprises a positioning auxiliary clamping groove and a threaded through groove, the positioning auxiliary clamping groove is uniformly arranged on the upper end face of the carrier, the threaded through groove is arranged in the claw, and a receiving groove is arranged at the top end of the threaded through groove, the threaded through groove and the fastening threaded column are threadedly connected, one end of the fastening threaded column is fixedly arranged with a knob block, the end face of the other end of the fastening threaded column is fixedly arranged with a rubber pad, the bottom end face of the rubber pad is equidistantly fixedly arranged with a positioning auxiliary clamping head, and the positioning auxiliary clamping head is arranged as a tapered head.

[0013] Preferably, the clamping support assembly comprises a support shaft, one end of the support shaft is fixedly arranged with a connecting threaded head, the connecting threaded head is threadedly connected with the connecting threaded cavity, a fixed limiting disc is fixedly arranged on the support shaft, an internally threaded fastening sleeve is threadedly connected on the support shaft, and one end of the internally threaded fastening sleeve is fixedly arranged with a limiting pressure ring.

[0014] Preferably, the support shaft body is sleeved with a support auxiliary structure, wherein the support auxiliary structure comprises a first interface body, a through hole is arranged at the center of the first interface body, a first loading slot is equidistantly arranged at the edge of the interface end of the first interface body, an interface thread groove is symmetrically arranged at the interface end of the first interface body, a second interface body is also provided with a through hole at the center thereof, a second loading slot is equidistantly arranged at the edge of the interface end of the second interface body, a cylindrical through slot is symmetrically arranged in the second interface body, and the second interface body and the first interface body are connected and fixed by an interface screw.

[0015] Preferably, the first interface body and the second interface body are connected to form a support disc body, the support disc body is sleeved on the support shaft body, the first loading slot and the second loading slot are arranged in corresponding positions and have the same number, the first loading slot and the second loading slot are connected to form a placing cavity, and an auxiliary ball is arranged in the placing cavity.

[0016] Compared with the prior art, the present application has the following beneficial effects: The car milling composite machining center part fixing device designed in the present application comprises a chuck body and a fixing base arranged at the bottom end of the chuck body, and chuck claws are equidistantly arranged on the chuck body; wherein the chuck claws are connected with a clamping auxiliary mechanism, and the clamping end of the chuck claw is connected with a cleaning assembly; a cylindrical part is placed on the chuck body, and before the cylindrical part is clamped and fixed by the chuck claw, the clamping auxiliary mechanism is used for auxiliary clamping, that is, the driving screw is pushed to drive the carrier until the clamping strip at one end of the carrier extends outward, then the clamping and positioning assembly is used for fixing the carrier, and finally the chuck claw drives the clamping strip at the end of the carrier to clamp and fix the cylindrical part. In this process, if the side wall of the cylindrical part has rust, the rust can be prevented from adhering to the clamping surface of the chuck claw due to the clamping action of the clamping strip, and the rust on the clamping surface of the clamping strip can be cleaned by the cleaning assembly, which is convenient to operate, stable in clamping work, and has a positive effect on improving the machining quality. That is, the handle is rotated to drive the driving screw to push and pull the carrier, and when clamping work is performed, the driving screw pushes the carrier to move outward, so that the clamping strip at the end of the carrier moves outward and is exposed. For the cylindrical part with rust on the surface, the rust may adhere to the clamping surface of the clamping strip after clamping and processing by the clamping strip. In order to avoid affecting the subsequent clamping work or to replace the part, the surface of the replaced workpiece does not have rust, so the rust adhered to the end surface of the clamping strip will cause damage to the new workpiece. Therefore, timely cleaning is required, and the cleaning work is realized by the cleaning assembly. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The structure connection schematic diagram of the part fixing chuck device of the present application; Figure 2 The structure connection schematic diagram of the claw and the clamping auxiliary mechanism of the present application; Figure 3 The structure connection schematic diagram of the part fixing chuck device of the present application; Figure 2 The structure connection enlarged schematic diagram of A in the present application; Figure 4 The internal partial structure connection schematic diagram of the claw of the present application; Figure 5 The structure connection schematic diagram of the part fixing chuck device of the present application; Figure 4 The structure connection enlarged schematic diagram of B in the present application; Figure 6 The structure connection schematic diagram of the clamping auxiliary mechanism and the cleaning assembly of the present application; Figure 7 The structure connection schematic diagram of the part fixing chuck device of the present application; Figure 6 The structure connection enlarged schematic diagram of C in the present application; Figure 8 The structure connection schematic diagram of the cleaning assembly of the present application; Figure 9 The structure connection schematic diagram of the part fixing chuck device of the present application; Figure 8 The structure connection enlarged schematic diagram of D in the present application; Figure 10 The structure connection schematic diagram of the fastening threaded column in the clamping and positioning assembly of the present application; Figure 11 The structure connection right side schematic diagram of the clamping and supporting assembly of the present application; Figure 12 The structure connection left side schematic diagram of the clamping and supporting assembly of the present application; Figure 13 The explosion right side schematic diagram of the supporting auxiliary structure connection of the present application; Figure 14 The explosion left side schematic diagram of the supporting auxiliary structure connection of the present application.

[0018] In the figure: 1, chuck body; 11, clamping jaw; 2, fixed base; 3, cylindrical part; 401, containing cavity; 402, bearing body; 403, auxiliary bearing; 404, drive screw; 405, handle; 406, clamping strip; 407, mounting groove; 408, connecting threaded cavity; 501, mounting plate; 502, square groove; 503, connecting body; 504, cleaning brush; 505, inclined bristles; 601, positioning auxiliary clamping groove; 602, threaded through slot; 603, containing groove; 604, fastening threaded column; 605, knob block; 606, rubber pad; 607, positioning auxiliary clamp; 701, support shaft; 702, connecting threaded head; 703, fixed limiting disc; 704, internally threaded fastening sleeve; 705, limiting pressure ring; 801, first docking body; 802, second docking body; 803, first loading groove cavity; 804, second loading groove cavity; 805, auxiliary ball; 806, docking screw; 807, through hole. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be described clearly and completely below. All other embodiments obtained by those of ordinary skill in the art without creative labor, based on the embodiments in the present application, belong to the scope of protection of the present application.

[0020] Embodiment one: please refer to Figures 1-14 A part fixing device for a turning-milling combined machining center, comprising a chuck body 1 and a fixed base 2 arranged at the bottom end of the chuck body 1, and clamping jaws 11 arranged equidistantly on the chuck body 1; wherein the clamping jaws 11 clamp cylindrical parts 3, the clamping jaws 11 are connected with clamping auxiliary mechanisms, and the clamping ends of the clamping jaws 11 are connected with cleaning assemblies.

[0021] The cylindrical part 3 is placed on the chuck body 1, and before the clamping jaws 11 clamp and fix the cylindrical part 3, the clamping auxiliary mechanisms are used for auxiliary clamping, that is, the drive screw 404 is used to push the bearing body 402 until the clamping strip 406 at one end of the bearing body 402 extends outward, then the clamping and positioning assembly is used to fix the bearing body 402, and finally the clamping jaws 11 drive the clamping strip 406 at the end of the bearing body 402 to clamp and fix the cylindrical part 3. In this process, if the side wall of the cylindrical part 3 has rust, due to the clamping action of the clamping strip 406, the rust can be prevented from adhering to the clamping surface of the clamping jaw 11, and the rust on the clamping surface of the clamping strip 406 can be cleaned by the cleaning assembly.

[0022] The clamping auxiliary mechanism comprises a containing cavity 401, a bearing body 402, an auxiliary bearing 403, a drive screw 404, a handle 405, clamping strips 406, a mounting groove 407 and a connecting threaded cavity 408. The containing cavity 401 is arranged in the claw 11, and one end of the containing cavity 401 is provided with the mounting groove 407. The bearing body 402 is movably arranged in the containing cavity 401, and one end of the bearing body 402 is provided with the auxiliary bearing 403. The auxiliary bearing 403 is also sleeved on one end of the drive screw 404. The other end of the drive screw 404 extends to the outside of the bearing body 402, and the end is fixedly provided with the handle 405. The other end of the bearing body 402 is equidistantly fixedly provided with the clamping strips 406. The end of the equidistantly arranged bottom row of clamping strips 406 is provided with the connecting threaded cavity 408, and the connecting threaded cavity 408 is connected with the clamping support assembly. The bearing body 402 is positioned by the clamping positioning assembly. The cleaning assembly is connected in the mounting groove 407. In the scheme, the handle 405 is rotated to drive the drive screw 404, so that the drive screw 404 pushes and pulls the bearing body 402 to move. When clamping, the drive screw 404 pushes the bearing body 402 to move outward, so that the clamping strips 406 at the end of the bearing body 402 move outward, and the clamping strips 406 are exposed.

[0023] In order to further improve the clamping stability of the cylindrical part 3 during clamping work, the position of the carrier 402 is further fastened by the clamping and positioning assembly, that is, the clamping and positioning assembly comprises a positioning auxiliary clamping groove 601, a threaded through groove 602, a containing groove body 603, a fastening threaded column 604, a knob block 605, a rubber pad 606 and a positioning auxiliary clamping head 607. The positioning auxiliary clamping groove 601 is uniformly arranged on the upper end face of the carrier 402. The threaded through groove 602 is arranged in the clamping jaw 11, and the top groove of the threaded through groove 602 is provided with the containing groove body 603. The threaded through groove 602 and the fastening threaded column 604 are threadedly connected. One end of the fastening threaded column 604 is fixedly provided with the knob block 605. The end face of the other end of the fastening threaded column 604 is fixedly provided with the rubber pad 606. The bottom end face of the rubber pad 606 is fixedly provided with the positioning auxiliary clamping head 607, which is arranged in a conical shape. After the carrier 402 is adjusted, the fastening threaded column 604 is tightened by the knob block 605, so that the bottom end of the fastening threaded column 604 extrudes the carrier 402. The positioning auxiliary clamping groove 601 and the rubber pad 606 at the bottom end of the fastening threaded column 604 are uniformly arranged on the carrier 402 and are used in cooperation. The bottom end of the rubber pad 606 is also provided with the positioning auxiliary clamping head 607, so that the positioning auxiliary clamping head 607 is tightly clamped with the positioning auxiliary clamping groove 601 at the corresponding position, further improving the stability of the carrier 402, and further improving the clamping stability of the clamping strip body 406 to the cylindrical part 3.

[0024] For the cylindrical part 3 with rust on the surface, after clamping processing by the clamping strip body 406, rust may adhere to the clamping surface of the clamping strip body 406. In order to avoid affecting the subsequent clamping work, or when the replaced part has no rust on the surface, the rust adhering to the end face of the clamping strip body 406 will cause damage to the new workpiece. Therefore, timely cleaning is required. The cleaning assembly is arranged to realize the cleaning work, that is, the cleaning assembly comprises a mounting plate 501, a square groove body 502, a connecting body 503, a cleaning brush body 504 and inclined bristles 505. The mounting plate 501 is clamped in the mounting groove 407, and is fixed by screws. The square groove body 502 is equally arranged in the mounting plate 501, and the inner side wall of the square groove body 502 is fixedly provided with the connecting body 503. The square groove body 502 and the clamping strip body 406 are arranged in corresponding positions and have the same number of groups. The connecting body 503 is provided with a circular groove, and the inner side wall of the circular groove is equally and annularly provided with the cleaning brush body 504. The end of the cleaning brush body 504 is provided with the inclined bristles 505.

[0025] After the processing is completed, first reverse the handle 405, through the drive screw 404 to pull back the carrier 402, and then make the clamping strip body 406 at the end of the carrier 402 retract, in this process, the clamping strip body 406 will pass through the circular groove in the connecting body 503, and the cleaning brush body 504 in the circular groove has a certain cleaning effect on the side wall of the clamping strip body 406, after the clamping strip body 406 retracts completely, the end face of the clamping strip body 406 will be in contact with the inclined bristles 505 at the end of the cleaning brush body 504, which has a corresponding cleaning effect on the rust on the end face of the clamping strip body 406, and tries to avoid rust residue on the end face of the clamping strip body 406; when it is necessary to push out the clamping strip body 406 for clamping work, the carrier 402 is pushed out again through the drive screw 404, so that the clamping strip body 406 passes through the circular groove in the connecting body 503 again, at this time the end of the clamping strip body 406 will first contact the inclined bristles 505 and the cleaning brush body 504, and the end of the clamping strip body 406 is cleaned again, improving the cleaning efficiency and ensuring the stability of the clamping work and avoiding rust from damaging the workpiece.

[0026] The cleaning assembly arranged therein is detachably arranged, facilitating replacement and maintenance work in the later period, that is, the mounting plate 501 is clamped in the mounting groove 407, and is fixed by screws, the connecting body 503 is arranged in the square groove 502, the connecting body 503 here can be fixed by welding or adhesive bonding, after the mounting plate 501 is removed, the cleaning brush body 504 and the inclined bristles 505 thereon can be cleaned and maintained, or the mounting plate 501 can be replaced as a whole.

[0027] In the actual processing process, for the parts to be processed, due to the different positions that need to be processed, it may be necessary to place a pad on the chuck body 1 to meet the height position of the part clamped by the claw 11, that is, the exposed position of the part needs to meet the processing requirements, so that the claw 11 does not block the processing position of the part after clamping the part, therefore, the present application also provides a clamping support assembly to meet the actual processing requirements, the clamping support assembly comprises a support shaft body 701, a connecting threaded head 702, a fixed limiting disc 703, an internal threaded fastening sleeve 704, a limiting pressure ring 705 and a supporting auxiliary structure, one end of the support shaft body 701 is fixedly provided with the connecting threaded head 702, the connecting threaded head 702 is threadedly connected with the connecting threaded cavity 408, the support shaft body 701 is fixedly provided with the fixed limiting disc 703, the support shaft body 701 is threadedly connected with the internal threaded fastening sleeve 704, and one end of the internal threaded fastening sleeve 704 is fixedly provided with the limiting pressure ring 705; wherein the support shaft body 701 is sleeved with the supporting auxiliary structure, wherein the supporting auxiliary structure comprises a first docking body 801, a second docking body 802, a first loading groove cavity 803, a second loading groove cavity 804, an auxiliary ball 805, a docking screw 806 and a through hole 807, the through hole 807 is arranged through the center position of the first docking body 801, and the edge position of the docking end of the first docking body 801 is equidistantly provided with the first loading groove cavity 803, the docking end of the first docking body 801 is symmetrically provided with a docking threaded groove, the center position of the second docking body 802 is also provided with the through hole 807, and the edge position of the docking end of the second docking body 802 is equidistantly provided with the second loading groove cavity 804, the second docking body 802 is symmetrically provided with a cylindrical through groove, and the second docking body 802 and the first docking body 801 are connected and fixed by the docking screw 806; the first docking body 801 and the second docking body 802 are docked to form a support disc body, and the support disc body is sleeved on the support shaft body 701, the first loading groove cavity 803 and the second loading groove cavity 804 are arranged in corresponding positions and have the same number of groups, and the two are docked to form a placing cavity, and the auxiliary ball 805 is placed in the placing cavity, and one auxiliary ball 805 is placed in one placing cavity.

[0028] According to the actual clamping machining requirements, the clamping strip body 406 on the bottom row of the end face of the carrier 402 is connected to the clamping support assembly, that is, the clamping support assembly is set according to the actual situation, which can be provided with one group or multiple groups. The connecting threaded head 702 at one end of the support shaft body 701 is threadedly connected with the connecting threaded cavity 408 on the end face of the clamping strip body 406. The support disc body provided on the support shaft body 701 supports the bottom end of the part to be machined, and the auxiliary ball 805 is equidistantly provided on the support disc body. The purpose is to provide a rolling action for the auxiliary ball 805 during the clamping and stabilization of the part to be machined, so as to avoid friction damage to the bottom end of the part.

[0029] The number of support disc bodies sleeved on the support shaft body 701 and the diameter of the support disc body need to be selected according to actual requirements. After sleeving multiple support disc bodies on the support shaft body 701, first, the support disc bodies are tightly attached. One side of the support disc body is limited by the fixed limiting disc 703. The other side of the support disc body is tightly limited by the limiting pressure ring 705. The inner threaded fastening sleeve 704 is threadedly connected with the support shaft body 701 until the limiting pressure ring 705 at one end of the inner threaded fastening sleeve 704 is in contact with the support disc body. The diameters of the support disc bodies formed by the abutment of the first abutment body 801 and the second abutment body 802 can be selected to be different specifications to meet the support requirements, which has better working flexibility. If the clamping support assembly is not needed, it is also very convenient to disassemble. The support shaft body 701 is directly rotated, so that the connection between the connecting threaded head 702 at one end of the support shaft body 701 and the connecting threaded cavity 408 at the end of the clamping strip body 406 is released.

[0030] The support disc body is spliced and arranged. The first abutment body 801 and the second abutment body 802 are connected and fixed by the abutment screw 806. The auxiliary ball 805 provided in the support disc body can also be easily taken out and replaced or maintained. After the first abutment body 801 and the second abutment body 802 are separated, the auxiliary ball 805 can be directly taken out from the loading groove cavity, which is convenient to operate.

[0031] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A part fixing device for a turning-milling combined machining center, comprising a chuck body (1) and a fixing base (2) arranged at the bottom end of the chuck body (1), and a clamping jaw (11) is arranged equidistantly on the chuck body (1). characterized in that The clamping jaw (11) clamps a cylindrical part (3), and the clamping jaw (11) is connected with a clamping auxiliary mechanism, and the clamping end of the clamping jaw (11) is connected with a cleaning assembly.

2. The part fixture for a turn-milling center as set forth in claim 1, wherein: The clamping auxiliary mechanism comprises a containing cavity (401), the containing cavity (401) is arranged in the clamping jaw (11), one end of the containing cavity (401) is provided with a mounting groove (407), a carrier (402) is movably arranged in the containing cavity (401), one end of the carrier (402) is embeddedly connected with an auxiliary bearing (403), the auxiliary bearing (403) is also sleeved on one end of a drive screw (404), the other end of the drive screw (404) extends to the outside of the carrier (402), and a handle (405) is fixedly arranged at the end of the drive screw (404), and the other end of the carrier (402) is equidistantly fixedly provided with a clamping strip (406).

3. The part fixture for a turn-milling center as set forth in claim 2, wherein: The end of the equidistantly arranged bottom row of clamping strips (406) is provided with a connecting threaded cavity (408), and the connecting threaded cavity (408) is connected with a clamping support assembly.

4. The part holding device for a turn-milling center as set forth in claim 2, wherein: The carrier (402) is positioned by a clamping positioning assembly, and the mounting groove (407) is connected with a cleaning assembly.

5. The part holding device for a turn-milling center as claimed in claim 1, wherein: The cleaning assembly comprises a mounting plate (501), the mounting plate (501) is adapted to be clamped in the mounting groove (407), and the mounting plate (501) is fixed by screws, a square groove (502) is equidistantly arranged in the mounting plate (501), and a connecting body (503) is fixedly arranged on the inner side wall of the square groove (502).

6. The part fixture for a turn-milling center as set forth in claim 5, wherein: The square groove (502) and the clamping strip (406) are arranged in corresponding positions and have the same number of groups; a circular groove is arranged in the connecting body (503), and a cleaning brush body (504) is equidistantly and annularly arranged on the inner side wall of the circular groove, and an inclined brush (505) is arranged at the end of the cleaning brush body (504).

7. The part holding device for a turn-milling center as claimed in claim 4, wherein: The clamping positioning assembly comprises a positioning auxiliary clamping groove (601) and a threaded through groove (602), the positioning auxiliary clamping groove (601) is uniformly arranged on the upper end face of the carrier (402), the threaded through groove (602) is arranged in the clamping jaw (11), and a containing groove (603) is arranged at the top groove of the threaded through groove (602), the threaded through groove (602) is threadedly connected with a fastening threaded column (604), one end of the fastening threaded column (604) is fixedly provided with a knob block (605), a rubber pad (606) is fixedly arranged on the end face of the other end of the fastening threaded column (604), equidistantly fixedly provided with a positioning auxiliary clamping head (607) on the bottom end face of the rubber pad (606), and the positioning auxiliary clamping head (607) is arranged as a tapered head.

8. The part holding device for a turn-milling center as claimed in claim 3, wherein: The clamping support assembly comprises a support shaft body (701), one end of the support shaft body (701) is fixedly provided with a connecting threaded head (702), the connecting threaded head (702) is threadedly connected with a connecting threaded cavity (408), the support shaft body (701) is fixedly provided with a fixed limiting disc (703), the support shaft body (701) is threadedly connected with an internally threaded fastening sleeve (704), and one end of the internally threaded fastening sleeve (704) is fixedly provided with a limiting pressure ring (705).

9. The part fixture for a turn-milling center as set forth in claim 8, wherein: The support shaft body (701) is sleeved with a support auxiliary structure, wherein the support auxiliary structure comprises a first docking body (801), a through hole (807) is arranged through the center of the first docking body (801), a first loading groove cavity (803) is equidistantly arranged at the edge of the docking end of the first docking body (801), a docking threaded groove is symmetrically arranged on the docking end of the first docking body (801), a through hole (807) is also arranged through the center of the second docking body (802), a second loading groove cavity (804) is equidistantly arranged at the edge of the docking end of the second docking body (802), a cylindrical through groove is symmetrically arranged in the second docking body (802), and the second docking body (802) and the first docking body (801) are fixedly connected by a docking screw (806).

10. The part fixture for a turn-milling center as set forth in claim 9, wherein: The first docking body (801) and the second docking body (802) are docked to form a support disc body, the support disc body is sleeved on the support shaft body (701), the first loading groove cavity (803) and the second loading groove cavity (804) are arranged in corresponding positions and have the same number of groups, the two form a placing cavity, and an auxiliary ball (805) is placed in the placing cavity, and one auxiliary ball (805) is placed in one placing cavity.

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