Side milling head assembly capable of increasing cutting depth and numerical control machining center

Abstract

The utility model relates to the technical field of numerical control machining centers, in particular to a side milling head assembly capable of increasing the cutting depth and a numerical control machining center. A side milling head; the connecting pin is fixedly connected with the side milling head; and the locking structure is arranged on the positioning locking plate, and the locking structure enables the connecting pin and the positioning locking plate to be switched between a locking state and a loosening state under the pneumatic or hydraulic action. The positioning locking plate is fixedly connected with the main shaft of the machining center, the connecting pin is fixedly connected with the side milling head, the locking structure is arranged on the positioning locking plate, and the locking structure enables the connecting pin and the positioning locking plate to be switched between a locking state and a loosening state through the pneumatic or hydraulic action. A main shaft of a machining center is fully utilized to control a pressure air source, the connecting pin is prevented from loosening, the cutting torque of the side milling head is improved, the rigidity is improved, and the cutting depth is increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to numerical control machining center technical field especially provides a side milling head subassembly and numerical control machining center that increase the amount of cutting. BACKGROUND

[0002] Numerical control machining center is a kind of automatic machine tool equipped with program control system, and the tool rotating center can be processed workpiece with the spindle rotating center line after machine tool is mounted side milling head. Side milling head is widely used in various fields of various mechanical processing, can reduce workpiece repeated clamping, improve machining accuracy and efficiency, and is used for vertical machining center, gantry machining center, horizontal boring and milling machining center.

[0003] Side milling head can be divided into light, medium and heavy three specifications. Light side milling head is light in weight (generally 5-15Kg), high in precision, small in torque, can be automatically changed tool in tool magazine, and positioning is realized using positioning block. With the universality of numerical control machine tool, especially the rapid growth of machining center with tool magazine, light side milling head also begins to be widely used.

[0004] However, the light side milling head in the prior art is mostly connected with numerical control machine tool only by the cooperation of positioning pin cone part, and gap is easily generated, and the connection of positioning pin and side milling head body is also only locked by locking screw. This connection mode is prone to looseness due to vibration of milling head cutting, resulting in weak rigidity of side milling head and small amount of cutting. INVENTION CONTENTS

[0005] In order to solve the above problems, the utility model provides a side milling head subassembly and numerical control machining center that increase the amount of cutting to solve the problem that the side milling head in the prior art is prone to looseness, resulting in weak rigidity of side milling head and small amount of cutting.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] The utility model provides a side milling head subassembly that increases the amount of cutting, which comprises:

[0008] Positioning locking plate, fixedly connected with the spindle of the machining center;

[0009] Side milling head;

[0010] Connecting pin, fixedly connected with the side milling head;

[0011] Locking structure, arranged on the positioning locking plate, the locking structure is switched between locking state and loosening state by pneumatic or hydraulic action, so that the connecting pin and the positioning locking plate.

[0012] According to the side milling head assembly that the utility model provides, the positioning locking plate is provided with a cooling liquid inlet pipeline, the connecting pin and the inside of the side milling head are provided with cooling liquid pipelines, and the cooling liquid pipelines are communicated with the cooling liquid inlet pipeline.

[0013] According to the side milling head assembly that the utility model provides, the side milling head comprises:

[0014] The middle support is provided with a mounting hole;

[0015] The side milling head body is connected to the bottom of the middle support, and the side milling head body is used for connecting a cutter;

[0016] The outer periphery of the connecting pin is provided with an expansion shaft sleeve, and the expansion shaft sleeve is in interference fit with the mounting hole.

[0017] According to the side milling head assembly that the utility model provides, the expansion shaft sleeve has two, and the two expansion shaft sleeves are located at the top end and the bottom end of the mounting hole.

[0018] According to the side milling head assembly that the utility model provides, the positioning locking plate is provided with a positioning locking sleeve, and an annular channel is formed in the positioning locking sleeve; the locking structure comprises:

[0019] The loosening pipeline and the locking pipeline are both arranged on the positioning locking plate, and the loosening pipeline is communicated with the annular channel;

[0020] At least two positioning locking pistons are located on the outer side of the connecting pin; the positioning locking pistons can move in a first direction, the first direction is perpendicular to the axis direction of the connecting pin; and one end of the positioning locking pistons, which is away from the connecting pin, is communicated with the locking pipeline.

[0021] According to the side milling head assembly that the utility model provides, the connecting pin is provided with one or more.

[0022] According to the side milling head assembly that the utility model provides, the side milling head body comprises:

[0023] The lower cutter handle is provided with a conical helical upper gear at the bottom end, and the lower cutter handle is rotationally arranged in the inside of the middle support;

[0024] A pair of cutter shafts are perpendicular to the lower cutter handle, and the cutter shafts are rotationally arranged in the inside of the middle support; the outer periphery of one of the cutter shafts is provided with a conical helical lower gear, the conical helical lower gear is engaged with the conical helical upper gear, and the pair of cutter shafts are connected through cutter shaft connecting bolts;

[0025] A first adjusting sleeve is sleeved on the outer periphery of the cutter shaft;

[0026] A second adjusting sleeve is arranged inside the middle support; the second adjusting sleeve is threadedly connected with the first adjusting sleeve.

[0027] According to the side milling head assembly capable of increasing the cutting amount, the side milling head body further comprises:

[0028] A pair of cover plates are arranged on the two sides of the support; and each cover plate is provided with a cooling liquid nozzle, which is communicated with the cooling liquid pipeline.

[0029] According to the side milling head assembly capable of increasing the cutting amount, the side milling head assembly further comprises a warehouse entering positioning device, which is arranged on the positioning locking plate.

[0030] The utility model further provides a numerical control machining center, including the side milling head assembly of any one in foregoing.

[0031] According to the above technical scheme, compared with the prior art, the utility model has the following beneficial effects:

[0032] The utility model provides a side milling head assembly capable of increasing the cutting amount, which has the following beneficial effects:

[0033] (1), through the fixed connection of the positioning locking plate and the main shaft of the machining center, the fixed connection of the connecting pin and the side milling head, the setting of the locking structure on the positioning locking plate, the switching of the connecting pin and the positioning locking plate between the locking state and the loosening state by the pneumatic or hydraulic action, the full use of the main shaft control pressure gas source of the machining center, the avoidance of the loosening of the connecting pin, the improvement of the cutting torque of the side milling head, the improvement of the rigidity and the increase of the cutting amount.

[0034] (2), through the setting of the cooling liquid inlet pipeline on the positioning locking plate, the setting of the cooling liquid pipeline in the connecting pin and the side milling head, the communication of the cooling liquid pipeline and the cooling liquid inlet pipeline and the corresponding setting of the outlet of the cooling liquid pipeline and the cutter, the connection of the cooling liquid and the cooling oil of the machining center into the cooling liquid inlet pipeline, the improvement of the cooling efficiency, the reduction of the thermal deformation of the side milling head, the improvement of the machining precision and the machining length and the increase of the service life.

[0035] (3), the outer periphery of the connecting pin is provided with an expansion shaft sleeve, an expansion sleeve type connection mode is adopted, and the problem of the loosening of the connecting pin is effectively solved.

[0036] (4), the bottom end of the lower tool holder is provided with a conical helical upper gear, the lower tool holder is rotatably arranged in the middle support, the outer periphery of one of the tool shafts is provided with a conical helical lower gear, the conical helical lower gear is engaged with the conical helical upper gear, the first adjusting sleeve is arranged on the outer periphery of one of the tool shafts, the second adjusting sleeve is arranged in the middle support, the second adjusting sleeve is threadedly connected with the first adjusting sleeve, when the conical helical upper gear and the conical helical lower gear have a gap, the tool shaft connecting bolt can be loosened, the first adjusting sleeve is rotated, the conical helical lower gear is moved forward and backward, and then the tool shaft connecting bolt is locked, so that the gap after gear wear can be adjusted, and stable operation of the side milling head is ensured.

[0037] The numerical control machining center provided by the utility model has various advantages as described above due to comprising the side milling head assembly as described above. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only embodiments of the utility model, and other drawings can be obtained according to the provided drawings without creative labor for those skilled in the art.

[0039] Figure 1 The utility model provides a structure diagram of side milling head assembly;

[0040] Figure 2 The utility model provides a sectional view of side milling head assembly;

[0041] Figure 3 The utility model provides a part structure amplification schematic view;

[0042] In the drawings, wherein:

[0043] 1, positioning locking plate;2, side milling head;3, connecting pin;4, locking structure;5, cooling liquid inlet pipeline;6, cooling liquid pipeline;7, expansion shaft sleeve;8, positioning locking sleeve;9, cooling liquid nozzle;10, warehouse positioning device;21, middle support;22, side milling head body;221, lower tool holder;222, conical helical upper gear;223, tool shaft;224, conical helical lower gear;225, tool shaft connecting bolt;226, first adjusting sleeve;227, second adjusting sleeve;228, cover plate;41, loosening pipeline;42, locking pipeline;43, positioning locking piston;81, annular channel. DETAILED DESCRIPTION

[0044] Clearly and completely describe the technical scheme in the embodiments of the utility model with the drawings in the embodiments of the utility model, obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the scope of the utility model protection.

[0045] The utility model embodiment provides a side milling head assembly that increases the cutting amount, which is used for machining center, including positioning locking plate 1, side milling head 2, connecting pin 3 and locking structure 4.

[0046] Among them, positioning locking plate 1 is fixedly connected with the main shaft of machining center, plays the role of fixed support, ensures that the whole side milling head assembly can be stably installed on machining center. Side milling head 2 is mainly used for the side milling operation. Connecting pin 3 is fixedly connected with side milling head 2, firmly installs side milling head 2 on positioning locking plate 1. Locking structure 4 is arranged on positioning locking plate 1, and locking structure 4 switches connecting pin 3 and positioning locking plate 1 between locking state and loosening state through pneumatic or hydraulic action.

[0047] The utility model embodiment makes full use of the main shaft control pressure gas source of machining center, avoids the loosening of connecting pin, improves the cutting torque of side milling head, improves the rigidity, increases the cutting amount. When the side milling head assembly is installed on machining center, it is an integral part of machining center, because the gas source of side milling head is the control gas source of machining center, thereby realizing the synchronous control of locking and loosening.

[0048] In an available embodiment of the utility model, cooling liquid inlet pipeline 5 is arranged on positioning locking plate 1, so that cooling liquid can be conveniently introduced from the outside to the inside of side milling head assembly, and necessary cooling and lubrication are provided for the tool. Cooling liquid pipeline 6 is arranged in connecting pin 3 and side milling head 2, and cooling liquid pipeline 6 is in communication with cooling liquid inlet pipeline 5; and the outlet of cooling liquid pipeline 6 is correspondingly arranged with the tool, which can ensure that the cooling liquid effectively acts on the tool, removes the heat generated during machining, simultaneously plays the lubricating role, reduces the tool wear, improves the machining precision and efficiency. Moreover, the on-off of cooling liquid is controlled through the cooling liquid control instruction of machining center.

[0049] Among them, the cooling liquid can also be replaced by cooling oil, as long as the cooling effect can be realized.

[0050] In one feasible embodiment of this utility model, the side milling head 2 includes a central support 21 and a side milling head body 22. The central support 21 has a mounting hole for receiving and fixing the connecting pin 3. The side milling head body 22 is connected to the bottom of the central support 21 and is used to connect the cutting tool. A shrinking bushing 7 is fitted around the outer periphery of the connecting pin 3, and the shrinking bushing 7 is interference-fitted with the mounting hole. When the shrinking bushing 7 is installed in the mounting hole, it expands slightly due to compression, thereby tightly filling the mounting hole and firmly fixing the connecting pin 3, preventing the connecting pin 3 from loosening or shifting during processing.

[0051] In one feasible embodiment of this utility model, there are two expansion sleeves 7, and the two expansion sleeves 7 are respectively located at the top and bottom of the mounting hole. By setting up double expansion sleeves 7, not only is the fixing strength of the connecting pin 3 improved, but the risk of loosening caused by vibration or external force is also reduced.

[0052] like Figure 3 As shown, in a feasible embodiment of this utility model, a positioning locking sleeve 8 is provided on the positioning locking plate 1, and an annular channel 81 is provided on the positioning locking sleeve 8; the locking structure 4 includes a loosening pipe 41, a locking pipe 42, and a positioning locking piston 43, both of which are provided on the positioning locking plate 1; and the loosening pipe 41 is connected to the annular channel 81; there are at least two positioning locking pistons 43, which are respectively located outside the connecting pin 3; the positioning locking pistons 43 can move along a first direction, which is perpendicular to the axis of the connecting pin 3; the end of the positioning locking piston 43 away from the connecting pin 3 is connected to the locking pipe 42. In the above embodiment, when the loosening gas of the connecting spindle tool-cutting cylinder enters the annular channel on the positioning locking sleeve 8, the positioning locking piston 43 retracts, loosens the connecting pin 3, and the side milling head assembly is in a loosened state.

[0053] When the locking gas of the connecting spindle cutter cylinder applies force to the positioning and locking piston 43, the positioning and locking piston 43 moves forward, locking the connecting pin 3, and the side milling head is in a locked state.

[0054] Multiple locking pistons 43 simultaneously approach the connecting pin 3 to lock the connecting pin 3, and the side milling head is in the locking device; multiple locking pistons 43 simultaneously move away from the connecting pin 3 to release the connecting pin 3, and the side milling head is in the released state.

[0055] In one feasible embodiment of this utility model, one or more connecting pins 3 are provided, preferably three, which can optimize the connection effect of the connecting pins 3.

[0056] In a feasible embodiment of the utility model, the side milling head body 22 includes a lower tool holder 221 and a pair of tool shafts 223, the bottom end of the lower tool holder 221 is provided with a conical helical upper gear 222, and the lower tool holder 221 is rotatably arranged in the inside of the middle support 21; the pair of tool shafts 223 are perpendicular to the lower tool holder 221, and the tool shafts 223 are rotatably arranged in the inside of the middle support 21; the outer periphery of one of the tool shafts 223 is provided with a conical helical lower gear 224, the conical helical lower gear 224 is engaged with the conical helical upper gear 222, and the power transmission can be realized. The pair of tool shafts 223 are connected through a tool shaft connecting bolt 225; a first adjusting sleeve 226 is arranged on the outer periphery of the tool shaft 223; a second adjusting sleeve 227 is arranged in the inside of the middle support 21; and the second adjusting sleeve 227 is threadedly connected with the first adjusting sleeve 226.

[0057] When the lower tool holder 221 is subjected to rotary power, the conical helical upper gear 222 drives the conical helical lower gear 224 to rotate, thereby driving the tool shaft 223 to rotate. When the conical helical upper gear 222 and the conical helical lower gear 224 have a gap after a period of work, the tool shaft connecting bolt 225 is loosened first, the first adjusting sleeve 226 is rotated, the conical helical lower gear 224 is moved forward and backward, and then the tool shaft connecting bolt 225 is locked, so that the gap after gear wear can be adjusted, and the stable operation of the side milling head is ensured.

[0058] In a feasible embodiment of the utility model, the side milling head body 22 further includes a pair of cover plates 228, the cover plates 228 are arranged on the two sides of the middle support 21; and a cooling liquid nozzle 9 is arranged on each cover plate 228, and the cooling liquid nozzle 9 is communicated with a cooling liquid pipeline 6. The cooling liquid nozzle 9 is used for directly spraying cooling liquid to a tool or a machining area for cooling and lubrication.

[0059] In a feasible embodiment of the utility model, a warehouse entry positioning device 10 is further included, and the warehouse entry positioning device 10 is arranged on the positioning locking plate 1. When the positioning locking plate 1 needs to be installed on a machining center, accurate alignment and fixation can be ensured.

[0060] The second aspect embodiment of the utility model provides a numerical control machining center, which includes the side milling head assembly for increasing the cutting amount as described in any one of the above embodiments.

[0061] The numerical control machining center provided by the second aspect embodiment of the utility model has various advantages as described above because it includes the side milling head assembly for increasing the cutting amount as described above.

[0062] The various embodiments described in this specification are presented by way of example, and each embodiment is presented for the purpose of conveying the novelty and inventive aspects of the present patent application. For the embodiments disclosed, because they correspond to the methods disclosed in the embodiments, they are described more simply, and the relevant parts are referred to the method part description.

[0063] The above description of disclosed embodiments enables one of ordinary skill in the art to make and use the patent application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the patent application. Thus, the present patent application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A side milling head assembly for increasing depth of cut, used in a machining center, characterized in that, include: The positioning locking plate (1) is fixedly connected to the spindle of the machining center; Side milling head (2); Connecting pin (3) is fixedly connected to the side milling head (2); A locking structure (4) is provided on the positioning locking plate (1). The locking structure (4) switches the connecting pin (3) and the positioning locking plate (1) between a locked state and a released state through pneumatic or hydraulic action.

2. The side milling head assembly with increased depth of cut according to claim 1, characterized in that, The positioning locking plate (1) is provided with a coolant inlet pipe (5), and the connecting pin (3) and the side milling head (2) are both provided with coolant pipes (6), which are connected to the coolant inlet pipe (5); and the outlet of the coolant pipe (6) is provided corresponding to the cutting tool.

3. The side milling head assembly with increased depth of cut according to claim 2, characterized in that, The side milling head (2) includes: The middle support (21) has mounting holes; The side milling head body (22) is connected to the bottom of the middle support (21); and the side milling head body (22) is used to connect the cutting tool. The outer periphery of the connecting pin (3) is fitted with a shrinking bushing (7), which is interference-fitted with the mounting hole.

4. The side milling head assembly with increased depth of cut according to claim 3, characterized in that, There are two expansion bushings (7), and the two expansion bushings (7) are located at the top and bottom of the mounting hole, respectively.

5. The side milling head assembly with increased depth of cut according to claim 1, characterized in that, The positioning locking plate (1) is provided with a positioning locking sleeve (8), and the positioning locking sleeve (8) has an annular channel (81); the locking structure (4) includes: The loosening pipe (41) and the locking pipe (42) are both set on the positioning locking plate (1); and the loosening pipe (41) is connected to the annular channel (81); At least two positioning and locking pistons (43) are located outside the connecting pin (3); the positioning and locking pistons (43) are movable in a first direction, which is perpendicular to the axis of the connecting pin (3); and the end of the positioning and locking piston (43) away from the connecting pin (3) is connected to the locking pipe (42).

6. The side milling head assembly with increased depth of cut according to claim 5, characterized in that, The connecting pin (3) is provided with one or more.

7. The side milling head assembly with increased depth of cut according to claim 3, characterized in that, The side milling head body (22) includes: The lower tool holder (221) has a conical helical upper gear (222) at its bottom end, and the lower tool holder (221) is rotatably disposed inside the middle support (21); A pair of cutter shafts (223) are perpendicular to the lower cutter shank (221), and the cutter shafts (223) are rotatably disposed inside the middle support (21); a conical helical lower gear (224) is provided on the outer periphery of one of the cutter shafts (223), and the conical helical lower gear (224) meshes with the conical helical upper gear (222); the pair of cutter shafts (223) are connected by cutter shaft connecting bolts (225); The first adjusting sleeve (226) is disposed on the outer periphery of the cutter shaft (223); The second adjusting sleeve (227) is disposed inside the middle support (21); the second adjusting sleeve (227) is threadedly connected to the first adjusting sleeve (226).

8. The side milling head assembly with increased depth of cut according to claim 7, characterized in that, The side milling head body (22) also includes: A pair of cover plates (228) are provided on both sides of the central support (21); and each cover plate (228) is provided with a coolant nozzle (9), which is connected to the coolant pipeline (6).

9. The side milling head assembly with increased depth of cut according to any one of claims 1-8, characterized in that, It also includes an inbound positioning device (10), which is mounted on the positioning locking plate (1).

10. A CNC machining center, characterized in that, Includes the side milling head assembly with increased depth of cut as described in any one of claims 1-9.

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