Self-centering and self-locking combined cutter

Abstract

The self-centering and self-locking combined cutter 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 to rotate. 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] The invention belongs to the technical field of mechanical processing, and in particular relates to a self-centering and self-locking combined tool that can be used for machine tools. Background Art

[0002] Chamfering of component holes is a common process in mechanical manufacturing, and chamfering tools are widely used in the process of mechanical processing. The service life of the chamfering tool and whether it can be automatically and quickly installed and tightened without stopping the machine are key factors in saving processing costs and improving processing efficiency. When using ordinary fixed chamfering tools to process workpieces on ordinary machine tools, the layered combination holes cannot be processed in one go, and the chamfering tool cannot automatically withdraw from the workpiece hole. The machine needs to be stopped to manually replace the chamfering tool, which has low processing efficiency and is difficult to control the chamfering depth, increasing production costs. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] The invention provides a self-centering and self-locking combined tool to solve the technical problem of how to realize rapid tool change and rapid processing of layered holes of parts.

[0005] (II) Technical solution

[0006] In order to solve the above technical problems, the present invention proposes a self-centering and self-locking combined tool, which includes a replaceable tool body, a self-centering tool handle and an automatic ejection mechanism; wherein,

[0007] The outer circle of the tool body of the replaceable tool body is processed with two equally distributed slots, in which replaceable blades are installed; a combined taper hole is processed in the center of the tool body, which is used to cooperate with the working positioning tool body installation end of the self-centering tool handle to guide and stabilize the tool head; the end faces of the combined taper hole are respectively processed with two progressive stop grooves for clamping the locking pin;

[0008] The self-centering tool holder is a connecting taper handle for a combined tool, including a connecting end taper handle and a working positioning tool body mounting end; wherein the connecting end taper handle is used to connect to the machine tool spindle, and the working positioning tool body mounting end is connected to the replaceable tool body; the working positioning tool body mounting end is processed with a guide cylinder and a positioning cone for matching 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, and the centers of the guide cylinder and the positioning cone are processed with a T-shaped hole for installing an automatic ejection mechanism;

[0009] The automatic ejection mechanism includes a sliding push rod, a locking pin, a spring fixing shaft, a compression spring and a tension spring; wherein, the structural shape of the sliding push rod is T-shaped, the front end is a cylinder, the rear end is processed with a conical surface with a herringbone symmetrical angle, and an arc positioning groove is processed on the outer circle of the sliding push rod; the inner ends of the locking pins are respectively processed with conical surfaces with equal and symmetrical angles, and the outer ends are arc surfaces; after the compression spring is sleeved on the front end of the sliding push rod, it is inserted through the T-hole of the self-centering tool handle, and the screw is vertically inserted into the horizontal hole of the T-hole from the side wall of the mounting end of the working positioning tool body, 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 respectively in contact with the cylindrical step surface of the sliding push rod and the bottom end surface of the T-hole of the self-centering tool handle; two locking pins are inserted through the vertical hole of the T-hole with the conical surface facing inward, each locking pin is installed with a horizontally arranged spring fixing shaft, and a tension spring is connected between the two spring fixing shafts.

[0010] Furthermore, the replaceable cutter body is made of 45# steel after being quenched and tempered.

[0011] Furthermore, a threaded hole is processed in the slot, and a screw is screwed into the threaded hole to press the blade.

[0012] Furthermore, the self-centering toolholder is made of high-strength chromium-molybdenum alloy steel.

[0013] Furthermore, the sliding push rod is made of 45# steel after being quenched and tempered.

[0014] Furthermore, the locking pin is made of 45# steel after being quenched and tempered.

[0015] (III) Beneficial effects

[0016] The present invention proposes a self-centering and self-locking combined tool, which includes a replaceable tool body, a self-centering tool handle and an automatic ejection mechanism. The working positioning tool body mounting end of the self-centering tool handle is equipped with an automatic ejection mechanism and can be inserted into the inner tapered hole of the replaceable tool body. After the end face of the sliding push rod contacts the lower end face of the replaceable tool body hole, the sliding push rod pushes the locking pin to extend, and the arc end of the locking pin is simultaneously inserted into the progressive stop groove of the end face of the replaceable tool body for locking. The replaceable tool body is equipped with the required replaceable blade, and the self-centering tool handle drives the tool body to rotate for cutting processing. When the self-centering tool handle is withdrawn at the end of the processing, the sliding push rod is ejected by the compression spring, and the locking pin is pulled back by the tension spring, the stop lock is released, and the replaceable tool body and the self-centering tool handle are automatically disengaged, so that the tool body can be quickly combined and separated, and the workpiece processing efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional diagram of the self-centering and self-locking combined tool structure of the present invention;

[0018] Figure 2 It is a front view of the self-locking and self-centering combined tool structure of the present invention;

[0019] Figure 3 It is a cross-sectional view of the self-locking and self-centering combined tool of the present invention. DETAILED DESCRIPTION

[0020] In order to make the purpose, content and advantages of the present invention more clear, the specific implementation methods of the present invention are further described in detail below in conjunction with the drawings and examples.

[0021] This embodiment provides a self-centering and self-locking combined tool, the structure of which is as follows: Figures 1 to 3 As shown, it mainly includes a replaceable tool body 1, a self-centering tool handle 2 and an automatic ejection mechanism.

[0022] The replaceable tool body 1 is made of 45# steel after tempering, and two evenly distributed slots are processed on the outer circle of the tool body, and threaded holes are processed in the slots. A replaceable blade 3 is installed in the slot, and a screw 4 is screwed into the threaded hole to press the blade 3; a combined tapered hole is processed in the center of the tool body for cooperating with the working positioning tool body mounting end of the self-centering tool handle 2 to guide and stabilize the tool head, and two progressive stop grooves are processed on the end faces of the combined tapered hole for clamping the locking pin 7.

[0023] The self-centering tool holder 2 is a connecting taper handle of a combined tool, made of high-strength chromium-molybdenum alloy steel, and includes a connecting end taper handle and a working positioning tool body mounting end. The connecting end taper handle is used to connect to the machine tool spindle, and the working positioning tool body mounting end is connected to the replaceable tool body 1. The working positioning tool body mounting end is machined with a guide cylinder and a positioning cone for matching with the replaceable tool body 1. The guide cylinder and the positioning cone are coaxially arranged and the guide cylinder is located at the front end of the positioning cone. The center of the guide cylinder and the positioning cone is machined with a T-shaped hole for installing the automatic ejection mechanism.

[0024] 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 tension spring 10. Among them, the sliding push rod 5 and the locking pin 7 are respectively made of 45# steel after quenching and tempering.

[0025] The structure of the sliding push rod 5 is T-shaped, with a cylindrical front end and a tapered surface with a symmetrical angle of a herringbone at the rear end, and an arc positioning groove is processed on the outer circle of the sliding push rod 5. The inner ends of the locking pins 7 are respectively processed with tapered surfaces with equal and symmetrical angles, and the outer ends are arc surfaces.

[0026] After the compression spring 9 is sleeved on the front end of the sliding push rod 5, it is inserted through the T-hole of the self-centering tool handle 2, and the screw 6 is vertically inserted into the horizontal hole of the T-hole from the side wall of the working positioning tool body mounting end, and the front end of the screw 6 extends into the arc positioning groove of the sliding push rod 5.

[0027] The 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 handle 2. Two locking pins 7 are inserted from the vertical holes of the T-shaped hole with the tapered surface facing 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 using the combined tool of the present invention, the connecting end tapered shank of the self-centering tapered shank 2 is first installed into the tapered hole of the machine tool spindle, and then the replaceable tool body 1 is placed in the hole of the workpiece to be processed.

[0028] During the feeding process of the machine tool, the guide cylinder at the working positioning tool body mounting end of the self-centering tool holder 2 first enters the cylindrical hole of the combined tapered hole of the replaceable tool body 1, and then the positioning cone at the working positioning tool body mounting end fits with the tapered surface in the combined tapered hole of the replaceable tool body 1 to achieve automatic correction and centering.

[0029] After the cylindrical end face of the sliding push rod 5 contacts the bottom end face of the combined tapered hole of the replaceable tool body 1, the herringbone symmetrical angle cone surface of the sliding push rod 5 pushes the symmetrical cone surface of the locking pin 7, causing the locking pin 7 to extend outward, and the arc ends of the two locking pins 7 are simultaneously inserted into the two progressive stop grooves on the replaceable tool body 1, and the torque is transmitted after locking. The self-centering tool handle 2 drives the replaceable tool body 1 to rotate, cuts the workpiece, and completes the chamfering of the layered holes. After the processing is completed, the self-centering tool handle 2 is withdrawn, and when the machine tool spindle is lifted, the sliding push rod 5 is ejected forward by the compression spring 9, and the tension spring 10 drives the spring fixing shaft 8 to pull the two locking pins 7 back into the vertical hole of the T-hole, releasing the stop lock, and the replaceable tool body 1 and the self-centering tool handle 2 are automatically and quickly disengaged and separated.

[0030] It has been proved through production practice that the self-centering and self-locking combined tool of the present invention can automatically eject the replaceable tool body without stopping the machine tool, thereby realizing automatic separation, saving tool change downtime and improving work efficiency.

[0031] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A self-centering and self-locking combined tool, characterized in that: The self-centering and self-locking combined tool comprises a replaceable tool body, a self-centering tool handle and an automatic ejection mechanism; wherein, The outer circle of the tool body of the replaceable tool body is processed with two equally distributed slots, and the replaceable blades are installed in the slots; the center of the tool body is processed with a combined tapered hole, which is used to cooperate with the working positioning tool body installation end of the self-centering tool handle to guide and stabilize the tool head, and the end faces of the combined tapered hole are respectively processed with two progressive stop grooves for clamping the locking pin; The self-centering tool handle is a connecting taper handle of a combined tool, comprising a connecting end taper handle and a working positioning tool body mounting end; wherein the connecting end taper handle is used to connect to a machine tool spindle, and the working positioning tool body mounting end is connected to 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 and the guide cylinder is located at the front end of the positioning cone, and the centers of the guide cylinder and the positioning cone are machined with a T-shaped hole for installing an automatic ejection mechanism; The automatic ejection mechanism comprises a sliding push rod, a locking pin, a spring fixing shaft, a compression spring and a tension spring; wherein, the sliding push rod has a T-shaped structure, a front end is a cylinder, a rear end is processed with a conical surface with a herringbone symmetrical angle, and an arc positioning groove is processed on the outer circle of the sliding push rod; the inner ends of the locking pins are respectively processed with conical surfaces with equal and symmetrical angles, and the outer ends are arc surfaces; after the compression spring is sleeved on the front end of the sliding push rod, it is inserted through the T-hole of the self-centering tool handle, and the screw is vertically inserted into the horizontal hole of the T-hole from the side wall of the mounting end of the working positioning tool body, 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 respectively in contact with the cylindrical step surface of the sliding push rod and the bottom end surface of the T-hole of the self-centering tool handle; two locking pins are inserted through the vertical hole of the T-hole with the conical surface inward, and each locking pin is installed with a horizontally arranged spring fixing shaft, and a tension spring is connected between the two spring fixing shafts.

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

3. The self-centering and self-locking combined tool according to claim 1, characterized in that: A threaded hole is processed in the clamping groove, and a screw is screwed into the threaded hole to press the blade tightly.

4. The self-centering and self-locking combined tool according to claim 1, characterized in that: The self-centering tool handle is made of high-strength chromium-molybdenum alloy steel.

5. The self-centering and self-locking combined tool according to claim 1, characterized in that: The sliding push rod is made of 45# steel after quenching and tempering.

6. The self-centering and self-locking combined tool according to claim 1, characterized in that: The locking pin is made of 45# steel after quenching and tempering.

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