Auxiliary indexing tool for machining inclined holes with hole center circles distributed as conical generatrix

Abstract

The utility model discloses an auxiliary indexing tool for machining inclined holes with hole center circles distributed as conical generatrix, which comprises a supporting and connecting mechanism fixedly mounted on a working table, a four-axis indexing head fixedly connected above the supporting and connecting mechanism, and a positioning and clamping mechanism fixedly connected above the four-axis indexing head, a workpiece to be machined is clamped on the positioning and clamping mechanism. The included angle between the axis of the inclined holes to be machined of the workpiece to be machined and the central axis of the cylindrical part is beta; in the machining state, the axes of the inclined holes in the workpiece to be machined are parallel to the Z axis one by one, and the inclination angle between the central axis of the workpiece to be machined and the Z axis is beta. By means of the tool, the four-axis indexing head can be assisted in indexing a plurality of inclined holes on a common vertical machining center, so that machining operation of all the holes is completed through one-time clamping, production efficiency is greatly improved, and precision of parts is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of auxiliary indexing tool of processing hole center circle as conical generatrix distribution inclined hole, especially a kind of auxiliary indexing tool of structure compact, high processing efficiency, low in cost, auxiliary four-axis indexing head is indexed to several inclined holes, on ordinary vertical machining center, a group of inclined holes with axis as a conical even distribution of several generatrix are processed. BACKGROUND

[0002] For the inclined hole of several to be processed on the end surface of cylindrical part, the axis of these holes is the even distribution of several generatrix of a conical. The conventional processing scheme is to use the way of sub-work step, and the processing of several inclined holes is completed one by one through multiple clamping. Or all holes can be processed through one clamping on a five-axis machining center. The disadvantages of the above two processing schemes are: the auxiliary working hours of sub-work step processing is too long, and the processing efficiency is low. For enterprises without a five-axis machining center, if a five-axis machining center is purchased for the processing of a part, the cost is too high. Therefore, it is urgent to provide an auxiliary indexing tool for processing inclined holes with hole center circle as conical generatrix distribution. SUMMARY

[0003] The technical problem to be solved by the utility model is to provide an auxiliary indexing tool for processing inclined holes with hole center circle as conical generatrix distribution, which has the characteristics of compact structure, high processing efficiency, low cost and auxiliary four-axis indexing head indexing several inclined holes.

[0004] To solve the above technical problems, the technical scheme of the utility model is an auxiliary indexing tool for processing inclined holes with hole center circle as conical generatrix distribution, and the innovation point is that the auxiliary indexing tool for processing inclined holes with hole center circle as conical generatrix distribution comprises a support connecting mechanism fixedly installed on a workbench top, a four-axis indexing head fixedly connected above the support connecting mechanism, and a positioning and clamping mechanism fixedly connected above the four-axis indexing head, and a workpiece to be processed is clamped on the positioning and clamping mechanism.

[0005] The workpiece to be processed is a cylindrical part, and a plurality of inclined holes to be processed are arranged around the central axis of the cylindrical part on the end surface of the cylindrical part. The axis of the inclined holes is the even distribution of several generatrix of a conical, and the included angle between the axis of the inclined holes and the central axis of the cylindrical part is β. In the processing state, the axis of the inclined holes on the workpiece to be processed is parallel to the Z-axis one by one, and the included angle between the central axis of the workpiece to be processed and the Z-axis is β.

[0006] Preferably, the support connecting mechanism comprises a lower base plate fixedly installed on the workbench top and horizontally arranged, an angle stand plate screw-fastened above the lower base plate, and an upper base plate screw-fastened above the angle stand plate, the included angle between the upper base plate and the workbench top being β; the four-axis indexing head is fixedly pressed on the upper base plate by a plurality of indexing head pressing plate assemblies.

[0007] Preferably, the angle stand plate is composed of two stand plates, i.e., a first stand plate and a second stand plate, the top surface of the first stand plate and the top surface of the second stand plate being in direct contact with the upper base plate, the included angle between the top surface of the first stand plate and the top surface of the second stand plate and the workbench top being β.

[0008] Preferably, the included angle between the top surface of the four-axis indexing head in contact with the positioning and clamping mechanism and the workbench top is β.

[0009] The indexing head pressing plate assembly is a four-axis indexing head pressing plate screw-movably connected to the upper base plate, the four-axis indexing head pressing plate pressing the process structure surface on the four-axis indexing head.

[0010] Preferably, the upper base plate is provided with at least four four-axis indexing head pressing plates pressing two parallel process structure surfaces on the four-axis indexing head, the screw being screw-connected to the upper base plate through the four-axis indexing head pressing plate.

[0011] The hole through which the screw passes on the four-axis indexing head pressing plate is a first waist-shaped hole penetrating from top to bottom.

[0012] Preferably, the positioning and clamping mechanism comprises a connecting base plate fixedly connected to the four-axis indexing head by a screw, a positioning assembly arranged on the connecting base plate, and a plurality of pressing assemblies arranged around the positioning assembly on the connecting base plate, the axis of the positioning assembly being inclined between the normal of the connecting base plate and the Z-axis by an angle β.

[0013] Preferably, the positioning assembly is arranged at the center of the connecting base plate, the positioning assembly comprising a positioning round pin screw-fitted to the connecting base plate, three equal-height positioning blocks uniformly arranged around the positioning round pin, and a chamfered pin arranged on the connecting base plate and located at one side of the positioning round pin, the chamfered pin being chamfered in the direction of the line connecting the chamfered pin and the positioning round pin.

[0014] Three pressing assemblies are arranged around the positioning assembly on the connecting base plate, the three pressing assemblies being respectively located in the direction of the line connecting the positioning round pin and the three equal-height positioning blocks, and the workpiece to be machined being located between the three pressing assemblies.

[0015] Preferably, the clamping assembly includes a pressure plate guide block vertically arranged and fixedly connected to the connecting base plate, a pressure plate support column vertically arranged and fixedly connected to the connecting base plate, a pressure plate arranged above the pressure plate guide block and the pressure plate support column, a screw rod passing through the pressure plate and threadedly connected to the connecting base plate, and an anti-loosening nut screwed onto the screw rod and abutting against the pressure plate, wherein the upper end of the pressure plate support column is embedded in the groove at the tail of the pressure plate;

[0016] The pressure plate guide block is close to the positioning pin relative to the pressure plate support.

[0017] Preferably, the pressure plate is provided with a second oblong hole through which the screw passes, the length direction of the second oblong hole is consistent with the length direction of the pressure plate, and the extension line of the length direction of the pressure plate passes through the center of the positioning pin.

[0018] Preferably, the side of the pressure plate closest to the positioning pin is an arc side, and the top of the pressure plate guide block is provided with a groove for the arc side to be embedded. After the anti-loosening nut is loosened, the pressure plate slides back and forth relative to the pressure plate guide block in the groove.

[0019] The advantages of this utility model are: with the tooling of this utility model, a four-axis indexing head can be used to index several inclined holes on a conventional vertical machining center, so that the machining of all holes can be completed in one clamping, which greatly improves production efficiency and ensures the accuracy of the parts.

[0020] During machining, the tool is first set. The plane where the center line of a hole and the rotation center of the four-axis indexing head are located is adjusted to be parallel to the angle plate in the support connection mechanism. At this time, the center line of the hole is perpendicular to the worktable of the machining center and is in the machining position. Then, the machining center is adjusted so that the Z-axis feed direction is coaxial with the center line of the hole, and the tool setting is completed. Then, the four-axis indexing head is controlled to complete the indexing of the holes on the workpiece to be machined, and all holes are machined in sequence. Attached Figure Description

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0022] Figure 1 This is a three-dimensional view of an auxiliary indexing fixture for machining oblique holes with a conical generatrix as the center circle of the hole, according to this utility model.

[0023] Figure 2 This is a three-dimensional view of an auxiliary indexing fixture for machining oblique holes with a conical generatrix as the center circle, which is a component of this utility model, including the workpiece to be machined.

[0024] Figure 3 This is the main view of an auxiliary indexing fixture for machining oblique holes with a conical generatrix as the center circle, according to this utility model.

[0025] Figure 4 This is a top view of an auxiliary indexing fixture for machining oblique holes with a conical generatrix as the center circle, according to this utility model.

[0026] Figure 5 This is a front view of the workpiece to be processed in an auxiliary indexing fixture for machining oblique holes with a conical generatrix as the center circle.

[0027] Figure 6 This is a top view of the workpiece to be processed in an auxiliary indexing fixture for machining oblique holes with a cone generatrix as the center circle.

[0028] Figure 7 This utility model describes an auxiliary indexing fixture for machining oblique holes with a conical generatrix, including a center sectional view of the workpiece to be machined.

[0029] Figure 8 This is a schematic diagram of the angle plate in an auxiliary indexing fixture for processing oblique holes with a cone generatrix as the center circle.

[0030] Figure 9 This is a schematic diagram of the pressure plate in an auxiliary indexing fixture for processing oblique holes with a conical generatrix as the center circle.

[0031] Figure 10 This is a schematic diagram of the structure of a four-axis indexing head pressure plate in an auxiliary indexing fixture for processing oblique holes with a conical generatrix as the center circle.

[0032] Figure 11 This is a schematic diagram of the pressure plate guide block in an auxiliary indexing fixture for processing oblique holes with a cone generatrix as the center circle.

[0033] In the diagram: 1-Workbench surface, 2-Supporting connection mechanism, 21-Lower base plate, 22-Angle upright plate, 221-First upright plate, 222-Second upright plate, 23-Upper base plate, 24-Four-axis indexing head pressure plate, 241-First oblong hole, 3-Four-axis indexing head, 31-Process structure surface, 4-Positioning and clamping mechanism, 41-Connecting base plate, 42-Positioning pin, 43-Equal height positioning block, 44-Beveled pin, 45-Pressure plate guide block, 451-Groove, 46-Pressure plate support column, 47-Pressure plate, 471-Second oblong hole, 472-Circular arc side, 48-Screw, 49-Anti-loosening nut, 5-Workpiece to be processed, 51-Inclined hole. Detailed Implementation

[0034] The auxiliary indexing fixture of this utility model for machining inclined holes with a cone generatrix as the center circle includes a support connecting mechanism 2 fixedly installed on the worktable 1, a four-axis indexing head 3 fixedly connected above the support connecting mechanism 2, and a positioning clamping mechanism 4 fixedly connected above the four-axis indexing head 3. The workpiece 5 to be machined is clamped on the positioning clamping mechanism 4. The workpiece 5 to be machined is a cylindrical part, and a number of inclined holes 51 to be machined are arranged around the central axis of the cylindrical part on the end face of the cylindrical part. The axis of the inclined holes 51 is a number of evenly distributed generatrixes of the same cone, and the angle between the axis of the inclined holes 51 and the central axis of the cylindrical part is β. When in the machining state, the axis of the inclined holes 51 on the workpiece 5 to be machined is parallel to the Z-axis one by one, and the angle between the axis of the workpiece 5 to be machined and the Z-axis is β. With the tooling of this utility model, the indexing of several inclined holes by three pairs of four-axis indexing heads can be assisted on a conventional vertical machining center, so that the machining of all holes can be completed in one clamping, which greatly improves production efficiency and ensures the accuracy of parts.

[0035] The aforementioned support connection mechanism 2 includes a lower base plate 21 fixedly installed on the workbench 1 and horizontally arranged, an angled vertical plate 22 fastened to the lower base plate 21 with screws, and an upper base plate 23 fastened to the angled vertical plate 22 with screws. The included angle between the upper base plate 23 and the workbench 1 is β. The four-axis indexing head 3 is pressed and fixed on the upper base plate 23 by several four-axis indexing head pressure plates 24.

[0036] The aforementioned angle plate 22 consists of two plates, including a first plate 221 and a second plate 222. The top surfaces of the first plate 221 and the second plate 222 are in direct contact with the upper base plate 23. The angle between the top surfaces of the first plate 221 and the second plate 222 and the worktable 1 is β. The support connection mechanism 2 of this utility model is fixedly connected to the T-nut in the T-slot on the worktable 1 of the machining center through a threaded pair. The workpiece to be processed is fixedly clamped in the positioning clamping mechanism 4. Through the first plate 221 and the second plate 222 in the support connection mechanism 2, the four-axis indexing head 3 is placed at an angle during processing, instead of rotating around an axis parallel to the Z-axis. The angle between the upper and lower sides of the angle plate 22 in the support connection mechanism 2 is β. The angle between the rotation center of the indexing plate of the tilted four-axis indexing head 3 and the Z-axis of the machining center is β. The angle between the center line of each hole to be processed and the rotation center of the workpiece 5 to be processed is β. Since the three included angles are equal, when the rotation center of the workpiece 5 to be processed coincides with the rotation center of the indexing plate of the four-axis indexing head 3 and is clamped in the positioning and clamping mechanism 4, the center line of each hole in the processing position is coaxial with the Z-axis of the processing center. Every time the four-axis indexing head rotates through an indexing angle, the axis of one of the holes coincides with the feed direction of the Z-axis of the processing center, and the indexing and processing of all holes are completed in sequence.

[0037] The top surface of the four-axis indexing head 3 that contacts the positioning and clamping mechanism 4 is the indexing plate of the four-axis indexing head 3, and the included angle between the indexing plate and the worktable surface 1 is β. The indexing head pressure plate assembly is a four-axis indexing head pressure plate 24 that is movably connected to the upper base plate 23 by screws, and the four-axis indexing head pressure plate 24 presses against the process structure surface 31 on the four-axis indexing head 3. The upper base plate 23 of this utility model is provided with at least four four-axis indexing head pressure plates 24 that press against the two parallel process structure surfaces 31 of the four-axis indexing head 3, and screws are threaded through the four-axis indexing head pressure plates 24 and connected to the upper base plate 23. The hole on the four-axis indexing head pressure plate 24 through which the screws pass is a first oblong hole 241 that runs vertically through the top and bottom. This utility model has two threaded holes on each of the two short edges of the upper base plate 23. The center of the oblong hole on the four-axis indexing head pressure plate 24 is aligned with the threaded hole on the upper base plate, so that one end of the four-axis indexing head pressure plate 24 presses against the process structure surface 31 of the four-axis indexing head 3 base, and the other end rests against the upper base plate 23. Four hexagonal socket head cap screws are then passed through the first oblong hole 241 of the four-axis indexing head pressure plate 24 and screwed into the threaded hole of the upper base plate 23. Tightening the screws ensures that the four-axis indexing head 3 is fixed in place. The upper edge of the lower base plate 21 has several threaded through holes. Screws pass through these threaded through holes and engage with T-nuts located in the T-slots of the machining center worktable, fixing the tooling support connection mechanism 2 to the machining center worktable surface 1.

[0038] The aforementioned positioning and clamping mechanism 4 includes a connecting base plate 41 fixedly connected to the four-axis indexing head 3 by screws, a positioning assembly disposed on the connecting base plate 41, and several clamping assemblies disposed around the positioning assembly on the connecting base plate 41. The axis of the positioning assembly is inclined at an angle β between the normal of the connecting base plate and the Z-axis. The positioning assembly is located at the center of the connecting base plate 41 and includes a positioning pin 42 fixed to the connecting base plate 41 by a threaded pair, three equal-height positioning blocks 43 evenly distributed around the positioning pin 42, and a chamfered pin 44 disposed on the connecting base plate 41 and located on one side of the positioning pin 42. The chamfered pin 44 is chamfered in the direction of the center line connecting the chamfered pin 44 and the positioning pin 42. Three clamping assemblies are disposed around the positioning assembly on the connecting base plate 41. The three clamping assemblies are respectively located in the direction of the center line connecting the positioning pin 42 and the three equal-height positioning blocks 43. The workpiece 5 to be processed is located between the three clamping assemblies. The workpiece to be processed is positioned in the positioning and clamping mechanism 4 by cooperating with three equal-height positioning blocks 43, a positioning pin 42 and a chamfering pin 44. Tightening the three anti-loosening nuts 49 makes the pressure plate 47 press against the end face of the workpiece to be processed, ensuring that the clamping is firm.

[0039] The clamping assembly of this utility model includes a pressure plate guide block 45 vertically arranged and fixedly connected to a connecting base plate 41, a pressure plate support column 46 vertically arranged and fixedly connected to the connecting base plate 41, a pressure plate 47 disposed above the pressure plate guide block 45 and the pressure plate support column 46, a screw 48 passing through the pressure plate 47 and threadedly connected to the connecting base plate 41, and an anti-loosening nut 49 screwed onto the screw 48 and abutting against the pressure plate 47. The upper end of the pressure plate support column 46 is embedded in a groove at the tail of the pressure plate 47. The pressure plate guide block 45 is close to the positioning pin 42 relative to the pressure plate support column 46. The pressure plate 47 is provided with a second oblong hole 471 through which the screw 48 passes. The length direction of the second oblong hole 471 is consistent with the length direction of the pressure plate 47, and the extension line of the length direction of the pressure plate 47 passes through the center of the positioning pin 42. The pressure plate 47 has an arc-shaped side 472 near the positioning pin 42. The top of the pressure plate guide block 45 is provided with a groove 451 for the arc-shaped side 472 to be inserted. After the anti-loosening nut 49 is loosened, the pressure plate can slide back and forth relative to the pressure plate guide block 45 in the groove 451. The edge of the connecting base plate 41 of this utility model is provided with several threaded through holes. Screws pass through the threaded through holes and are coaxially fixedly connected to the indexing plate of the four-axis indexing head 3.

[0040] During machining, the tool is first set. The plane where the center line of a hole and the rotation center of the four-axis indexing head 3 are located is adjusted to be parallel to the angle plate 22 in the support connection mechanism 2. At this time, the center line of the hole is perpendicular to the worktable 1 of the machining center and is in the machining position. Then, the machining center is adjusted so that the Z-axis feed direction is coaxial with the center line of the hole, and the tool setting is completed. Then, the four-axis indexing head 3 is controlled to complete the indexing of the holes on the workpiece to be machined, and all holes are machined in sequence.

[0041] It should be understood that the above description is for illustrative purposes and not for limitation. Many embodiments and applications beyond the provided examples will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of this application should not be determined by reference to the above description, but rather by reference to the appended claims and the full scope of their equivalents. For purposes of completeness, all articles and references, including patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the preceding claims is not intended as a waiver of that subject matter, nor should it be construed as an indication that the inventors have not considered that subject matter as part of the disclosed utility model subject matter.

Claims

1. An auxiliary indexing fixture for machining oblique holes with a cone generatrix as the center circle, characterized in that: The auxiliary indexing fixture for machining oblique holes with a conical generatrix distribution includes a support and connection mechanism fixedly installed on the worktable, a four-axis indexing head fixedly connected above the support and connection mechanism, and a positioning and clamping mechanism fixedly connected above the four-axis indexing head. The workpiece to be machined is clamped on the positioning and clamping mechanism. The workpiece to be processed is a cylindrical part. Several inclined holes to be processed are arranged around the central axis of the cylindrical part on the end face of the cylindrical part. The axis of the inclined holes is several evenly distributed generatrices of the same cone. The angle between the axis of the inclined holes and the central axis of the cylindrical part is β. When in the processing state, the axis of each inclined hole on the workpiece to be processed is parallel to the Z-axis, and the inclination angle between the central axis of the workpiece to be processed and the Z-axis is β.

2. The auxiliary indexing fixture for machining oblique holes with a conical generatrix as described in claim 1, characterized in that: The supporting connection mechanism includes a lower base plate fixedly installed on the workbench and horizontally arranged, an angled vertical plate fastened to the lower base plate with screws, and an upper base plate fastened to the angled vertical plate with screws. The included angle between the upper base plate and the workbench is β. The four-axis indexing head is pressed and fixed on the upper base plate by several indexing head pressure plate assemblies.

3. The auxiliary indexing fixture for machining oblique holes with a conical generatrix as described in claim 2, characterized in that: The angled upright plate consists of two upright plates, including a first upright plate and a second upright plate. The top surfaces of the first upright plate and the second upright plate are in direct contact with the upper base plate. The angle between the top surfaces of the first upright plate and the second upright plate and the workbench surface is β.

4. The auxiliary indexing fixture for machining oblique holes with a conical generatrix as described in claim 2, characterized in that: The angle between the top surface of the four-axis indexing head that contacts the positioning and clamping mechanism and the worktable surface is β; The indexing head pressure plate assembly is a four-axis indexing head pressure plate that is movably connected to the upper base plate with screws, and the four-axis indexing head pressure plate presses against the process structure surface of the four-axis indexing head.

5. The auxiliary indexing fixture for machining oblique holes with a conical generatrix as described in claim 4, characterized in that: The upper base plate is provided with at least four four-axis indexing head pressure plates that press against the two parallel process structure surfaces of the four-axis indexing head. The screw passes through the four-axis indexing head pressure plates and is threaded to the upper base plate. The hole on the four-axis indexing head plate through which the screw passes is a first oblong hole that runs vertically through the top and bottom.

6. The auxiliary indexing fixture for machining oblique holes with a conical generatrix as described in claim 1, characterized in that: The positioning and clamping mechanism includes a connecting base plate fixedly connected to the four-axis indexing head by screws, a positioning component set on the connecting base plate, and several clamping components set around the positioning component on the connecting base plate. The axis of the positioning component is inclined at an angle β between the normal of the connecting base plate and the Z-axis.

7. The auxiliary indexing fixture for machining oblique holes with a conical generatrix as described in claim 6, characterized in that: The positioning component is located at the center of the connecting base plate. The positioning component includes a positioning pin fixed to the connecting base plate by a threaded pair, three positioning blocks of equal height evenly distributed around the positioning pin, and a chamfered pin located on the connecting base plate and on one side of the positioning pin. The chamfered pin is chamfered in the direction of the center line connecting the chamfered pin and the positioning pin. Three clamping components are arranged around the positioning component on the connecting base plate. The three clamping components are respectively located on the line connecting the positioning pin and the three positioning blocks of equal height. The workpiece to be processed is located between the three clamping components.

8. The auxiliary indexing fixture for machining oblique holes with a conical generatrix as described in claim 7, characterized in that: The clamping assembly includes a pressure plate guide block vertically set and fixedly connected to the connecting base plate, a pressure plate support column vertically set and fixedly connected to the connecting base plate, a pressure plate set above the pressure plate guide block and the pressure plate support column, a screw rod passing through the pressure plate and threaded to the connecting base plate, and an anti-loosening nut screwed onto the screw rod and abutting against the pressure plate. The upper end of the pressure plate support column is embedded in the groove at the tail of the pressure plate. The pressure plate guide block is close to the positioning pin relative to the pressure plate support.

9. The auxiliary indexing fixture for machining oblique holes with a conical generatrix as described in claim 8, characterized in that: The pressure plate is provided with a second oblong hole through which the screw passes. The length direction of the second oblong hole is consistent with the length direction of the pressure plate, and the extension line of the length direction of the pressure plate passes through the center of the positioning pin.

10. The auxiliary indexing fixture for machining oblique holes with a conical generatrix as described in claim 8, characterized in that: The pressure plate has an arc side near the positioning pin, and the top of the pressure plate guide block is provided with a groove for the arc side to be embedded. After the anti-loosening nut is loosened, the pressure plate slides back and forth relative to the pressure plate guide block in the groove.

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