Self-centering and self-locking combined cutter

Abstract

The utility model provides a self-centering self-locking combined cutter which comprises a replaceable cutter body, a self-centering cutter handle and an automatic ejection mechanism, the automatic ejection mechanism is installed at the working positioning cutter body installation end of the self-centering cutter handle and can be inserted into an inner taper hole of the replaceable cutter body, and after the end face of a sliding push rod is in contact with the lower end face of a hole of the replaceable cutter body, the self-centering cutter handle is pushed out. The sliding push rod pushes the locking pin to extend out, the arc end of the locking pin is inserted into the progressive stop groove in the end face of the replaceable cutter body at the same time for locking, the replaceable cutter body is provided with the replaceable blade, and the self-centering cutter handle drives the cutter body to rotate for cutting. When machining is finished, the self-centering cutter handle retreats, meanwhile, the sliding push rod is popped out through the compression spring, the locking pin is pulled back through the extension spring, backstop locking is relieved, the replaceable cutter body and the self-centering cutter handle are automatically disengaged, rapid combination and separation of the cutter bodies are achieved, and the workpiece machining efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical processing technology, specifically relating to a self-centering and self-locking combination tool that can be used in machine tools. Background Technology

[0002] Chamfering of holes in parts is a common process in machining and manufacturing, and chamfering tools are widely used in this process. The service life of the chamfering tool and whether it can be automatically and quickly installed and secured without stopping the machine are key factors in saving machining costs and improving machining efficiency. When machining workpieces using ordinary fixed chamfering tools on ordinary machine tools, layered combined holes cannot be machined in one go, and the chamfering tool cannot automatically retract from the workpiece hole, requiring manual replacement after stopping the machine. This results in low machining efficiency, and the chamfering depth is difficult to control, increasing production costs. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] This invention proposes a self-centering and self-locking combined cutting tool to solve the technical problem of how to achieve rapid tool changing and rapid machining of layered holes in parts.

[0005] (II) Technical Solution

[0006] To address the aforementioned technical problems, this utility model proposes a self-centering and self-locking combined cutting tool, which includes a replaceable tool body, a self-centering tool holder, and an automatic ejection mechanism; wherein...

[0007] The replaceable tool body has two evenly distributed slots on its outer circumference, in which replaceable inserts are installed. The center of the tool body has a combined tapered hole for mating with the working positioning tool body mounting end of the self-centering tool holder, which serves to guide and stabilize the tool head. The end face of the combined tapered hole has two progressive stop grooves for locking the locking pin.

[0008] The self-centering tool holder is a connecting tapered shank for a combination tool, including a connecting end tapered shank and a working positioning tool body mounting end. The connecting end tapered shank is used to connect with the machine tool spindle, and the working positioning tool body mounting end is connected with a replaceable tool body. The working positioning tool body mounting end is machined with a guide cylinder and a positioning cone for cooperating with the replaceable tool body. The guide cylinder and the positioning cone are coaxially arranged, with the guide cylinder located at the front end of the positioning cone. A T-hole is machined at the center of the guide cylinder and the positioning cone for installing an automatic ejection mechanism.

[0009] The automatic ejection mechanism comprises a sliding push rod, a locking pin, a spring fixing shaft, a compression spring and a stretching spring; wherein the sliding push rod is T-shaped in structure, the front end is a cylinder, the rear end is a conical surface with a symmetrical angle, and an arc positioning groove is formed on the outer circle of the sliding push rod; the inner end of the locking pin is provided with a conical surface with equal and symmetrical angles, and the outer end is an arc surface; the compression spring is sleeved on the front end of the sliding push rod, then inserted into the T-shaped hole of the self-centering tool holder, the screw is vertically inserted into the horizontal hole of the vertical hole of the T-shaped hole from the side wall of the working positioning tool body mounting end, and the front end of the screw extends into the arc positioning groove of the sliding push rod; the two ends of the compression spring are in contact with the stepped surface of the cylinder of the sliding push rod and the bottom end surface of the T-shaped hole of the self-centering tool holder respectively; the two locking pins are inserted into the vertical hole of the T-shaped hole and the conical surfaces are inward, and the spring fixing shaft is horizontally arranged on each locking pin, and the stretching spring is connected between the two spring fixing shafts.

[0010] Further, the replaceable tool body is made of 45# steel after quenching and tempering.

[0011] Further, a threaded hole is formed in the clamping groove, and the screw is screwed into the threaded hole to press the blade.

[0012] Further, the self-centering tool holder is made of high-strength chromium-molybdenum alloy steel.

[0013] Further, the sliding push rod is made of 45# steel after quenching and tempering.

[0014] Further, the locking pin is made of 45# steel after quenching and tempering.

[0015] (Three) beneficial effects

[0016] The utility model provides a kind of self-centering self-locking combined tool, including replaceable tool body, self-centering tool holder and automatic ejection mechanism, and the working positioning tool body mounting end of self-centering tool holder is equipped with automatic ejection mechanism and can be inserted into tapered hole in replaceable tool body, after the end surface of sliding push rod is contacted with replaceable tool body hole low end surface, sliding push rod pushes out locking pin, locking pin arc end is inserted into the progressive stop groove of replaceable tool body end surface simultaneously, and locking is carried out, replaceable tool body is equipped with the replaceable blade required, and self-centering tool holder drives tool body to rotate and carry out cutting processing.Self-centering tool holder is withdrawn simultaneously when processing is finished, and sliding push rod is ejected by compression spring, and locking pin is pulled back by stretching spring, and stop locking is released, replaceable tool body and self-centering tool holder are automatically disconnected, tool body is quickly combined and separated, and workpiece processing efficiency is improved. DRAWINGS

[0017] Fig. 1 It is the structure perspective drawing of the self-centering self-locking combined tool of the utility model;

[0018] Fig. 2 It is the structure main view of the self-locking self-centering combined tool of the utility model.

[0019] Fig. 3 The utility model discloses a self-locking self-centering combined cutter. DETAILED DESCRIPTION

[0020] In order to make the purpose, content and advantage of the utility model more clearly, the specific implementation of the utility model is described in further detail below in combination with the drawings and examples.

[0021] The utility model discloses a self-centering self-locking combined cutter, which is shown in the structure as Figs. 1-3 The replaceable cutter body 1 is made of 45# steel after quenching and tempering, two evenly distributed clamping grooves are processed on the outer circle of the cutter body, threaded holes are processed in the clamping grooves, replaceable blades 3 are installed in the clamping grooves, and screws 4 are screwed into the threaded holes to press the replaceable blades 3 tightly.

[0022] A combined taper hole is processed in the center of the cutter body, which is used for cooperation with the working positioning cutter body mounting end of the self-centering cutter handle 2, plays a role of guiding and stabilizing the cutter head, and the end faces of the combined taper hole are respectively processed with two progressive stop grooves for clamping and locking the locking pin 7.

[0023] The self-centering cutter handle 2 is a connecting taper handle of the combined cutter, is made of high-strength chromium-molybdenum alloy steel, and includes a connecting end taper handle and a working positioning cutter body mounting end.

[0024] The connecting end taper handle is used for connection with the main shaft of a machine tool, and the working positioning cutter body mounting end is connected with the replaceable cutter body 1.

[0025] A T-shaped hole is processed in the center of the guiding cylinder and the positioning cone for installation of the automatic ejection mechanism.

[0026] The automatic ejection mechanism mainly includes a sliding push rod 5, a locking pin 7, a spring fixing shaft 8, a compression spring 9 and a stretching spring 10.

[0027] Two ends of the compression spring 9 are in contact with the cylindrical step surface of the sliding push rod 5 and the bottom end surface of the T-shaped hole of the self-centering tool holder 2 respectively. The two locking pins 7 are inserted into the vertical holes of the T-shaped hole and the tapered surfaces are inward, a horizontally arranged spring fixing shaft 8 is installed on each locking pin 7, and a tension spring 10 is connected between the two spring fixing shafts 8. When the combined tool is used, the connecting end taper of the self-centering taper holder 2 is first installed into the taper hole of the main shaft of the machine tool, and then the replaceable tool body 1 is placed in the workpiece hole to be machined.

[0028] During the feeding process of the machine tool, the guide cylinder of the working positioning tool body mounting end of the self-centering tool holder 2 first enters the cylindrical hole of the combined taper hole of the replaceable tool body 1, and then the positioning cone of the working positioning tool body mounting end is attached to the tapered surface in the combined taper hole of the replaceable tool body 1, so that automatic correction and centering are realized.

[0029] After the cylindrical end surface of the sliding push rod 5 is in contact with the bottom end surface of the combined taper hole of the replaceable tool body 1, the symmetrical tapered surface of the sliding push rod 5 pushes the symmetrical tapered surface of the locking pin 7, so that the locking pin 7 extends outward, the arc end of the two locking pins 7 is inserted into the two progressive stop grooves on the replaceable tool body 1 at the same time, and the torque is transmitted after locking. The self-centering tool holder 2 drives the replaceable tool body 1 to rotate, and the workpiece is cut and processed, and the chamfering of the layered hole is completed. After the processing is completed, the self-centering tool holder 2 is withdrawn, and when the main shaft of the machine tool is lifted, the sliding push rod 5 is popped out forward by the compression spring 9, the two locking pins 7 are pulled back into the vertical holes of the T-shaped hole by the tension spring 10 and the spring fixing shaft 8, the stop locking is released, and the replaceable tool body 1 and the self-centering tool holder 2 are automatically and quickly separated.

[0030] The production practice proves that the self-centering and self-locking combined tool can automatically pop out the replaceable tool body without stopping the machine tool, realize automatic separation, save the tool changing downtime, and improve the work efficiency.

[0031] The above only describes the preferred embodiments of the present application, and it should be pointed out that for ordinary skilled persons in the technical field, without departing from the technical principles of the present application, a number of improvements and deformations can be made, and these improvements and deformations should be regarded as the protection scope of the present application.

Claims

1. A self-centering self-locking solid combined cutter, characterized by, The self-centering self-locking combined tool comprises a replaceable tool body, a self-centering tool handle and an automatic ejection mechanism. The replaceable tool body is provided with two evenly distributed clamping grooves on the outer circle of the tool body, and a replaceable blade is installed in the clamping grooves; a combined taper hole is processed in the center of the tool body, which is used for cooperating with the working positioning tool body mounting end of the self-centering tool handle to guide and stabilize the tool head, and two progressive stop grooves are respectively processed on the end face of the combined taper hole for clamping and locking the pin; The self-centering tool handle is a connecting taper handle of the combined tool, comprising a connecting end taper handle and a working positioning tool body mounting end; the connecting end taper handle is used for connecting with the main shaft of the machine tool, and the working positioning tool body mounting end is connected with the replaceable tool body; the working positioning tool body mounting end is provided with a guide cylinder and a positioning cone for cooperating with the replaceable tool body, the guide cylinder and the positioning cone are coaxially arranged, and the guide cylinder is located at the front end of the positioning cone; a T-shaped hole is processed in the center of the guide cylinder and the positioning cone for installing the automatic ejection mechanism; The automatic ejection mechanism comprises a sliding push rod, a locking pin, a spring fixing shaft, a compression spring and a stretching spring; the structure of the sliding push rod is T-shaped, the front end is a cylinder, the rear end is provided with a person-shaped symmetrical angle taper surface, and an arc positioning groove is processed on the outer circle of the sliding push rod; the inner end of the locking pin is respectively provided with taper surfaces with equal angles and symmetry, and the outer end is an arc surface; the sliding push rod is inserted into the T-shaped hole of the self-centering tool handle after the compression spring is sleeved on the front end, a screw is vertically inserted into the horizontal hole of the T-shaped hole from the side wall of the working positioning tool body mounting end, and the front end of the screw extends into the arc positioning groove of the sliding push rod; the two ends of the compression spring are in contact with the cylinder step surface of the sliding push rod and the bottom end surface of the T-shaped hole of the self-centering tool handle; the two locking pins are inserted into the vertical hole of the T-shaped hole with the taper surfaces inward, a spring fixing shaft is installed on each locking pin in a horizontal manner, and a stretching spring is connected between the two spring fixing shafts.

2. The self-centering self-locking solid combined cutter according to claim 1, wherein The replaceable tool body is made of 45# steel after quenching and tempering.

3. The self-centering self-locking solid combination cutter according to claim 1, wherein, Threaded holes are processed in the clamping grooves, and screws are screwed into the threaded holes to press the blade tightly.

4. The self-centering self-locking solid combination cutter according to claim 1, wherein, The self-centering tool handle is made of high-strength chromium-molybdenum alloy steel.

5. The self-centering self-locking solid combination cutter according to claim 1, wherein, The sliding push rod is made of 45# steel after quenching and tempering.

6. The self-centering self-locking solid combination cutter according to claim 1, wherein, The locking pin is made of 45# steel after quenching and tempering.

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