Auxiliary reaming cutter for machining

Abstract

The utility model discloses an auxiliary reaming cutter for machining, relates to the technical field of machining, and solves the problems that in the prior art, the actual machining requirement cannot be met, and the production progress and the product quality can be influenced. Comprising a cutter shaft, the cutter shaft is coaxially connected to a machine tool spindle, the lower end of the cutter shaft is connected with a cutter head, and the cutter head is coaxially connected with the machine tool spindle; the tool bit comprises a tool shaft, the tool shaft is cylindrical, a first tool groove is formed in the tool shaft, a reaming tool is connected into the first tool groove, a second tool groove is formed in the lower end in the first tool groove, a guiding tool is connected into the second tool groove, the guiding tool is arranged at the lower end of the reaming tool, and the reaming tool is arranged in the second tool groove. The number of the guiding cutters and the number of the reaming cutters connected to the cutter shaft are at least two. The device has the beneficial effects that the stress condition of the cutter in the machining process can be reduced, and the phenomenon that a machine tool spindle is locked due to the too large cutting depth is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical processing technical field, concretely is a kind of mechanical processing auxiliary reaming cutter. BACKGROUND

[0002] In industrial production practice, especially hole processing, there are many situations, many times need to ream the workpiece, and in this process, there must be strict tool engagement control.In addition, when processing a hole of workpiece, the depth control of hole is also very important.

[0003] When machining cylinder cover, the four Φ43 holes are relatively thick due to casting blank, and the existing cutter is prone to cause spindle seizure if the tool engagement is too large during machining, which has serious consequences, on the one hand, it will damage the machine tool, bring huge repair cost and production stagnation loss to the enterprise, on the other hand, it will also cause quality problems, so that the machining precision cannot meet the requirements.Not only can not meet the actual processing needs, but also seriously affect the smooth progress of production and the quality of products.

[0004] Therefore, the utility model provides a kind of mechanical processing auxiliary reaming cutter for solving the generation of the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of mechanical processing auxiliary reaming cutter, to solve the problem of not meeting the actual processing needs in prior art, and affecting production and product quality.

[0006] The technical scheme adopted by the utility model to solve its technical problems is:

[0007] A kind of mechanical processing auxiliary reaming cutter, including cutter shaft, the cutter shaft is coaxially connected on machine tool spindle, the lower end of the cutter shaft is connected with tool bit, the tool bit is coaxially connected with the cutter shaft;The tool bit includes cutter shaft, the cutter shaft is cylindrical, first cutter slot is opened in the cutter shaft, reaming cutter is connected in the first cutter slot, second cutter slot is opened in the lower end in the first cutter slot, guide cutter is connected in the second cutter slot, the guide cutter is arranged at the lower end of the reaming cutter, the number of the guide cutter and the reaming cutter connected on the cutter shaft is at least two.

[0008] By adopting the above technical scheme, the stress condition of cutter in machining process can be reduced, and the spindle seizure phenomenon caused by too large tool engagement can be avoided.

[0009] Further, chamfer is opened in the lower end of the guide cutter, and the inclination of chamfer is 40°-60°.

[0010] By adopting the technical scheme, the reaming tool can follow the correct path in the subsequent cutting process, thereby improving the machining precision.

[0011] Further, the lower end of the reaming tool is uniformly provided with a plurality of cutting edges.

[0012] By adopting the technical scheme, the cylinder head can be preliminarily cut, and the situation that the machine tool spindle is locked can be avoided.

[0013] Further, the tool shaft and the tool shaft are provided with a cooling liquid channel, and a plurality of cooling liquid nozzles are uniformly connected in the first tool groove, the cooling liquid nozzles correspond to the guide tool and the reaming tool, and the cooling liquid nozzles are in communication with the cooling liquid channel.

[0014] By adopting the technical scheme, the cooling liquid can effectively reduce the friction coefficient of the tool and the cylinder head, reduce the loss of friction, improve the cutting efficiency, and the cooling liquid can also improve the cutting lubrication condition, prevent the occurrence of the surface cracks, burrs and other situations of the cylinder head caused by dry friction.

[0015] Further, the material of the reaming tool and the guide tool is cubic boron nitride.

[0016] By adopting the technical scheme, smaller cutting force and lower cutting temperature can be generated in the cutting process, and the surface machining quality of the cylinder head is improved.

[0017] Further, the guide tool and the reaming tool are arranged in a ring array along the axis of the tool shaft.

[0018] By adopting the technical scheme, the multiple points of the cylinder head can be simultaneously cut, and the machining efficiency is improved.

[0019] Further, the second tool groove is spliced by a quadrilateral groove and a circular groove, the guide tool is detachably connected with the second tool groove through a countersunk screw, and the reaming tool is detachably connected with the first tool groove through a countersunk screw.

[0020] By adopting the technical scheme, detachable connection can be realized, the replacement and maintenance of the tool become more convenient, the operation difficulty and time cost are reduced, and different guide tools with different shapes and sizes can be selected and installed according to actual needs, so that different machining requirements can be met.

[0021] Compared with the prior art, the utility model has the beneficial effects that:

[0022] The utility model discloses a cutting tool and the expansion hole tool are rotated together under the drive of the cutter shaft when the main shaft of machine tool starts rotating, and the guiding tool contacts the cylinder cover first, and the lower end of guiding tool is provided with chamfer, so that guiding tool can cut into the through hole of cylinder cover smoothly and play the guiding role, and then under the guidance of guiding tool, expansion hole tool contacts cylinder cover and carries out cutting, and under the drive of main shaft of machine tool, expansion hole tool rotates at high speed, and cylinder cover is cut and expanded, which can reduce the stress condition of cutting tool in the processing, and avoid the phenomenon that the main shaft of machine tool is locked because the cutting amount is too large. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is the front view of the utility model;

[0024] Figure 2 It is the partial section schematic view of left view of the utility model;

[0025] Figure 3 It is the schematic diagram of explosion structure of the utility model;

[0026] Figure 4 It is the bottom view of the utility model;

[0027] In the drawing: 1, cutter shaft;11, main shaft of machine tool;13, cutting tool shaft;2, first cutting tool groove;21, expansion hole tool;22, cutting edge;3, second cutting tool groove;31, guiding tool;4, cooling liquid channel;41, cooling liquid nozzle. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantage of the embodiment of the utility model more clear, the technical scheme in the embodiment of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiment of the utility model, obviously, the described embodiment is a part of the embodiment of the utility model, instead of all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the scope of protection of the utility model.

[0029] In the present application, the orientation or position relationship indicated by the terms "upper", "inner", "outer", "middle" and the like is based on the orientation or position relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components must have a specific orientation, or be constructed and operated in a specific orientation.

[0030] As Figure 1As shown, a machining auxiliary reaming tool includes a tool shaft 1 coaxially connected to a machine tool spindle 11, and a tool head connected to the lower end of the tool shaft 1 and coaxially connected with the tool shaft 1. The tool head includes a tool shaft 13 in a cylindrical shape, a first tool groove 2 is formed on the tool shaft 13, a reaming tool 21 is connected in the first tool groove 2, a guide tool 31 is arranged at the lower end of the reaming tool 21, and a chamfer is formed at the lower end of the guide tool 31, and the inclination of the chamfer is 40°-60°. First, the tool shaft 1 is coaxially connected to the machine tool spindle 11, then the tool shaft 13 is coaxially connected with the tool shaft 1, and the connection is ensured to be stable. When the machine tool spindle 11 starts to rotate, the tool shaft 13 drives the guide tool 31 and the reaming tool 21 to rotate together. Then the guide tool 31 first contacts the cylinder head, and the chamfer formed at the lower end of the guide tool 31 enables the guide tool 31 to smoothly cut into the through hole of the cylinder head and play a guiding role. Then under the guidance of the guide tool 31, the reaming tool 21 starts to contact and cut the cylinder head, and rotates at high speed under the drive of the machine tool spindle 11 to cut and ream the cylinder head. The lower end of the reaming tool 21 is uniformly provided with a plurality of cutting edges 22. Then the cutting edges 22 can preliminarily cut the cylinder head to avoid the situation that the machine tool spindle 11 is locked.

[0031] As shown in Figure 2 and Figure 3 , a second tool groove 3 is formed at the lower end in the first tool groove 2, a guide tool 31 is connected in the second tool groove 3, the second tool groove 3 is spliced from a quadrilateral groove and a circular groove, the guide tool 31 is detachably connected with the second tool groove 3 through a countersunk screw, and the reaming tool 21 is detachably connected with the first tool groove 2 through a countersunk screw. The detachable connection through the countersunk screw makes the replacement and maintenance of the guide tool 31 and the reaming tool 21 more convenient, reduces the operation difficulty and time cost, and at the same time, different shapes and sizes of guide tools 31 can be selected for installation according to actual needs to meet different machining requirements.

[0032] As shown in Figure 3 , a cooling liquid channel 4 is arranged through the tool shaft 1 and the tool shaft 13, a plurality of cooling liquid nozzles 41 are uniformly connected in the first tool groove 2, the cooling liquid nozzles 41 correspond to the guide tool 31 and the reaming tool 21, and the cooling liquid nozzles 41 are in communication with the cooling liquid channel 4. Then in the cutting process, the cooling liquid is uniformly sprayed on the guide tool 31 and the reaming tool 21 through the nozzles to play a cooling and lubricating role. The cooling liquid can effectively reduce the friction coefficient of the tool and the cylinder head, reduce the loss of friction, improve the cutting efficiency, and at the same time, the cooling liquid can also improve the cutting lubrication condition, prevent the occurrence of surface cracks, burrs and other situations of the cylinder head caused by dry friction, and the cutting chips generated in the cutting process are taken away by the cooling liquid to keep the surface of the tool and the cylinder head clean and ensure the stability and efficiency of the machining process

[0033] As Figure 4 shown, the number of guiding cutters 31 and reaming cutters 21 connected on the cutter shaft 13 is at least two. The guiding cutters 31 and reaming cutters 21 are arranged in a ring array along the axis of the cutter shaft 13. Multiple points of the cylinder head can be cut at the same time, improving the machining efficiency. The materials of the reaming cutters 21 and guiding cutters 31 are cubic boron nitride. Smaller cutting force and lower cutting temperature can be generated during cutting, which is beneficial to improve the surface machining quality of the cylinder head.

[0034] The working process of the utility model is as follows:

[0035] Firstly, the cutter shaft 1 is coaxially connected on the machine tool spindle 11, then the cutter shaft 13 is coaxially connected with the cutter shaft 1, and the connection is stable. When the machine tool spindle 11 starts to rotate, the cutter shaft 13 drives the guiding cutters 31 and reaming cutters 21 to rotate together. Then the guiding cutters 31 first contact the cylinder head. The lower end of the guiding cutter is chamfered, so that the guiding cutter 31 can smoothly cut into the through hole of the cylinder head and play a guiding role. Then under the guidance of the guiding cutter 31, the reaming cutter 21 starts to contact and cut the cylinder head. Under the driving of the machine tool spindle 11, the cylinder head is cut and reamed at high speed.

[0036] The lower end of the reaming cutter 21 is uniformly provided with a plurality of cutting edges 22, so that the cutting edges 22 can preliminarily cut the cylinder head to avoid the situation that the machine tool spindle 11 is locked. The cooling liquid channel 4 is arranged through the cutter shaft 1 and the cutter shaft 13. The first cutter groove 2 is uniformly connected with a plurality of cooling liquid nozzles 41. These nozzles correspond to the guiding cutters 31 and reaming cutters 21. During cutting, the cooling liquid is uniformly sprayed on the guiding cutters 31 and reaming cutters 21 through the nozzles, which plays a cooling and lubricating role. The cooling liquid can effectively reduce the friction coefficient of the cutter and the cylinder head, reduce the loss of friction, improve the cutting efficiency, and at the same time, the cooling liquid can also improve the cutting lubrication condition, prevent the occurrence of surface cracks, burrs and other situations of the cylinder head caused by dry friction, and the cutting chips generated during cutting are taken away by the cooling liquid, so as to keep the cutter and the surface of the cylinder head clean, and ensure the stability and efficiency of the machining process.

Claims

1. A machining auxiliary reaming tool comprising a tool shaft (1), characterized in that, The tool shaft (1) is coaxially connected to the machine tool spindle (11), and a tool head is connected to the lower end of the tool shaft (1), and the tool head is coaxially connected to the tool shaft (1); The tool head comprises a tool shaft (13), which is cylindrical, and a first tool groove (2) is formed in the tool shaft (13), and a reaming tool (21) is connected in the first tool groove (2), and a second tool groove (3) is formed in the lower end of the first tool groove (2), and a guide tool (31) is connected in the second tool groove (3), and the guide tool (31) is arranged at the lower end of the reaming tool (21), and the number of the guide tool (31) and the reaming tool (21) connected to the tool shaft (13) is at least two.

2. A mechanical machining assisted reaming tool according to claim 1, characterized in that, The guide tool (31) is provided with a chamfer at the lower end, and the inclination of the chamfer is 40°-60°.

3. A mechanical machining assisted reaming tool according to claim 2, characterized in that, The lower end of the reaming tool (21) is uniformly provided with a plurality of cutting edges (22).

4. A mechanical machining assisted reaming tool according to claim 3, characterized in that, The tool shaft (1) and the tool shaft (13) are provided with a cooling liquid channel (4) penetrating therefrom, a plurality of cooling liquid nozzles (41) are uniformly connected in the first tool groove (2), the cooling liquid nozzles (41) correspond to the guide tool (31) and the reaming tool (21), and the cooling liquid nozzles (41) are in communication with the cooling liquid channel (4).

5. A mechanical machining assisted reaming tool according to claim 4, characterised in that, The materials of the guide tool (31) and the reaming tool (21) are cubic boron nitride.

6. A mechanical machining assisted reaming tool according to claim 5, characterised in that, The guide tool (31) and the reaming tool (21) are arranged in a ring array along the axis of the tool shaft (13).

7. A mechanical machining assisted reaming tool according to claim 6, characterised in that, The second tool groove (3) is formed by a quadrilateral groove and a circular groove, the guide tool (31) is detachably connected to the second tool groove (3) through a countersunk screw, and the reaming tool (21) is detachably connected to the first tool groove (2) through a countersunk screw.

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