Workpiece clamping mechanism for belt pulley finish turning equipment

Abstract

The utility model discloses a workpiece clamping mechanism for belt pulley finish turning equipment, which comprises a three-jaw chuck fixedly mounted at the output shaft end of a machine tool spindle; the clamping reinforcing mechanism comprises blocking and pushing rod pieces which are fixedly connected to the inner ends of the clamping jaws of the three-jaw chuck in a stepped mode, a fixing shaft piece is movably arranged in the three-jaw chuck in a sleeved mode, and the blocking and pushing rod pieces are movably inserted into inclined face clamping grooves of the fixing shaft piece respectively; the fixed shaft piece is fixedly sleeved with a rubber sleeve, the front end part of the fixed shaft piece is fixedly connected with a blocking and pushing plate capable of blocking and pushing the rubber sleeve, and the rear end part of the rubber sleeve is fixedly provided with a fixed ring plate; and backward pulling force is formed on the fixing shaft piece through an elastic piece arranged at the rear end of the three-jaw chuck, so that the rear end face of the fixing ring plate is fixedly connected to the front end face of the push rod blocking piece in an abutting mode. The belt pulley clamping device is simple in structure, easy to assemble and install and capable of effectively and stably clamping a belt pulley workpiece.

Description

Technical Field

[0001] The utility model relates to the technical field of tooling fixtures for pulley processing equipment, in particular to a workpiece clamping mechanism for pulley precision turning equipment. Background Art

[0002] After key processes such as stamping and spinning, existing pulleys have surface accuracy requirements for the contact surface between the pulley and the belt, specifically the belt mounting groove. Therefore, the pulley requires precision turning of the belt mounting groove using appropriate precision turning equipment.

[0003] Existing pulley precision turning equipment mainly adopts conventional CNC lathes, which clamp the pulley workpiece through a fixture set on the main shaft, and then use a turning tool set on the tool plate to turn the belt mounting groove of the pulley workpiece. At present, there are two main types of fixtures used in pulley precision turning equipment. One is a conventional three-jaw chuck. Since the turning area occupies most of the workpiece surface, simply relying on the claws of the three-jaw chuck to clamp the position of the pulley workpiece where the pulley mounting groove is not set, its clamping preload often does not meet the design requirements; the other is to cooperate with a pull rod mechanism and a spring expansion sleeve, and expand the spring expansion sleeve through the pull rod mechanism to directly fix the workpiece on the inner wall of the workpiece. The pull rod mechanism needs to be set inside the main shaft of the machine tool and needs to be driven by a corresponding power mechanism. The overall structure is extremely complex, and its assembly and operation stability are difficult to effectively maintain.

[0004] Therefore, the research purpose of this utility model is to design a workpiece clamping mechanism for pulley precision turning equipment which has a simple structure, is easy to assemble and install, and can effectively form a stable clamping for the pulley workpiece and reduce the adverse effects on the operating stability of the machine tool spindle. Summary of the Invention

[0005] In view of the technical problems existing in the above-mentioned prior art, the present invention provides a workpiece clamping mechanism for a pulley precision turning equipment, which can effectively solve the technical problems existing in the above-mentioned prior art.

[0006] The technical solution of the utility model is:

[0007] A workpiece clamping mechanism for a pulley precision turning device, comprising:

[0008] The three-jaw chuck is fixedly mounted on the output shaft end of the machine tool spindle and is used to clamp the pulley workpiece at a position where there is no belt mounting groove;

[0009] The clamping reinforcing mechanism comprises a push-blocking rod member fixed to the inner end of the claw of the three-jaw chuck in a stepped manner, the inner end of the push-blocking rod member is provided in a beveled manner, a corresponding fixed shaft member is movably sleeved in the three-jaw chuck, the fixed shaft member is provided with a beveled clamping groove matched with the push-blocking rod member, and the push-blocking rod member is movably inserted into the beveled clamping groove.

[0010] The rear end of the three-jaw chuck is fixed with a corresponding partition plate, the center of the partition plate is fixed with a corresponding guide shaft in front, the rear side of the fixed shaft member is provided with a guide hole matched with the guide shaft, and the fixed shaft member is movably inserted into the guide shaft through cooperation of the guide hole and the guide shaft.

[0011] The elastic member is a coil spring, the elastic member is fixedly sleeved on the guide shaft, and the two ends of the elastic member are fixed to the rear end face of the partition plate and the fixed shaft member, respectively.

[0012] The rubber sleeve is uniformly provided with a plurality of corresponding through holes, when the rubber sleeve is extruded to be rigidly clamped on the inner circle of the pulley workpiece, the through holes are compressed into micropores and abut against the inner wall of the pulley workpiece.

[0013] The push-blocking rod member is integrally formed and fixed to the claw of the three-jaw chuck.

[0014] The three-jaw chuck is fixedly installed on the machine tool main shaft through a plurality of uniformly distributed butt bolts.

[0015] The advantages of the utility model are as follows:

[0016] 1) Based on the three-jaw chuck, the utility model further adds a clamping reinforcement mechanism with a simple structure, easy assembly and installation, and capable of forming a linkage with the three-jaw chuck. It includes a push rod member fixed to the inner end of the jaws of the three-jaw chuck in a stepped shape, and then a corresponding fixed shaft member is movably sleeved in the three-jaw chuck, and a corresponding rubber sleeve is fixedly sleeved on the fixed shaft member outside the push rod member. Through the inclined surface cooperation between the push rod member and the fixed shaft member, when the jaws move inward to clamp the position where the pulley workpiece is not provided with a belt mounting groove, the fixed shaft member is synchronously driven to move backward; in this process, the fixed ring plate is fixed by the push rod member, and the rubber sleeve is pushed by the push plate provided at the front end of the fixed shaft member, so that under the clamping action of the push plate and the fixed ring plate, the rubber sleeve is squeezed to be rigidly pressed against the inner ring of the pulley workpiece. The two clamping pre-tightening are formed synchronously by linkage, which can effectively form a stable clamping for the pulley workpiece and reduce the adverse effects on the operating stability of the machine tool spindle.

[0017] 2) The rear end of the three-jaw chuck of this utility model is fixedly connected to a partition plate, with a guide shaft fixed forward at the center of the partition plate. The fixed shaft is removably inserted into the guide shaft through a corresponding guide hole. The elastic member is a coil spring, which is fixedly mounted on the guide shaft and respectively fixed to the partition plate and the rear end surface of the fixed shaft. The partition plate, guide shaft, and coil spring cooperate to form a coaxial support for the fixed shaft, thereby further stabilizing its engagement with the push rod and ensuring the practical effect of the utility model.

[0018] 3) The rubber sleeve of this utility model is evenly distributed with numerous corresponding through-holes. When the rubber sleeve is squeezed until it is rigidly pressed against the inner ring of the pulley workpiece, the through-holes are compressed into micropores and abut the inner wall of the pulley workpiece. This allows some of the vibration generated during the finish turning of the pulley workpiece to be directly transmitted into the compressed through-holes, where they resonate and dissipate energy, thereby reducing vibration generated during the finish turning process, thereby improving the operating stability of the machine tool spindle and enhancing workpiece machining accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the present utility model.

[0020] Figure 2 It is a structural diagram of the clamping reinforcement mechanism.

[0021] Figure 3 This is a diagram of the usage state of the utility model.

[0022] In the accompanying drawings: three-jaw chuck 1, machine tool spindle 2, pulley workpiece 3, clamping reinforcement mechanism 4, push rod 401, fixed shaft 402, rubber sleeve 403, push plate 404, fixed ring plate 405, elastic member 406, inclined slot 5, partition 6, guide shaft 7, through hole 8. DETAILED DESCRIPTION

[0023] In order to facilitate understanding by those skilled in the art, the structure of the present invention is further described in detail with reference to the following embodiments and accompanying drawings:

[0024] refer to Figure 1-3 , a workpiece clamping mechanism for a pulley precision turning equipment, comprising:

[0025] The three-jaw chuck 1 is fixedly mounted on the output shaft end of the machine tool spindle 2 and is used to clamp the pulley workpiece 3 at a position where the belt mounting groove is not provided;

[0026] The clamping reinforcement mechanism 4 comprises a push rod 401 which is fixed to the inner end of the jaws of the three-jaw chuck 1 in a stepped shape, and the inner end of the push rod 401 is arranged in an inclined shape. A corresponding fixed shaft 402 is movably sleeved in the three-jaw chuck 1, and an inclined slot 5 which is adapted to the push rod 401 is provided on the fixed shaft 402. The push rod 401 can be movably inserted into the inclined slot 5; a corresponding rubber sleeve 403 is fixedly sleeved on the fixed shaft 402 outside the push rod 401, and a push plate 404 which can block and push the rubber sleeve 403 is fixed to the front end of the fixed shaft 402. 3 is fixedly provided with a corresponding fixed ring plate 405 at the rear end thereof; an elastic member 406 is provided at the rear end of the three-jaw chuck 1 to form a backward pulling force on the fixed shaft 402, so that the rear end face of the fixed ring plate 405 is fixedly abutted against the front end face of the push rod 401; the claws of the three-jaw chuck 1 are driven to move inwardly until they are tightly abutted against the position where the corresponding pulley workpiece 3 is not provided with a belt mounting groove, and the push rod 401 moves inward accordingly to drive the fixed shaft 402 to move backward, and under the clamping action of the push plate 404 and the fixed ring plate 405, the rubber sleeve 403 is squeezed to be rigidly pressed against the inner ring of the pulley workpiece 3.

[0027] The inclined surface cooperation between the blocking push rod 401 and the fixed shaft 402 is used to drive the fixed shaft 402 to move backward synchronously when the claw moves inward to clamp the position of the pulley workpiece 3 without a belt mounting groove; in this process, the blocking push rod 401 is used to fix the fixed ring plate 405, and the blocking push plate 404 arranged at the front end of the fixed shaft 402 is used to block and push the rubber sleeve 403, so that the rubber sleeve 403 is squeezed to be rigidly clamped on the inner ring of the pulley workpiece 3 under the clamping action of the blocking push plate 404 and the fixed ring plate 405. Two clamping pre-tightening are formed in linkage and synchronization, so that the pulley workpiece 3 can be effectively and stably clamped and the adverse effect on the operation stability of the machine tool spindle 2 is reduced.

[0028] The rear end of the three-jaw chuck 1 is fixedly connected with a corresponding partition plate 6, the center of the partition plate 6 is fixedly connected with a corresponding guide shaft 7 in front, the rear side of the fixed shaft 402 is provided with a guide hole matched with the guide shaft 7, and the fixed shaft 402 is movably inserted into the guide shaft 7 through cooperation of the guide hole and the guide shaft 7. The elastic member 406 is a coil spring, the elastic member 406 is fixedly sleeved on the guide shaft 7, and the two ends of the elastic member 406 are fixedly connected to the partition plate 5 and the rear end surface of the fixed shaft 402 respectively.

[0029] Under the cooperation of the partition plate 6, the guide shaft 7 and the coil spring, the fixed shaft 402 is effectively supported and installed in a coaxial state, so that the cooperation between the fixed shaft 402 and the blocking push rod 401 can be further stabilized, and the practical effect of the utility model is ensured.

[0030] The rubber sleeve 403 is uniformly provided with a plurality of corresponding through holes 8, when the rubber sleeve 403 is squeezed to be rigidly clamped on the inner ring of the pulley workpiece 3, the through holes 8 are compressed into micropores and abut against the inner wall of the pulley workpiece 3.

[0031] During the turning process, the vibration generated by the pulley workpiece 3 is directly transmitted to the compressed through holes 8 and forms resonance energy consumption damping in the compressed through holes 8. Therefore, the vibration generated during fine machining is reduced, which helps to improve the operation stability of the machine tool spindle 2 and improve the workpiece machining precision.

[0032] The blocking push rod 401 is integrally formed and fixedly connected to the claw of the three-jaw chuck 1. The three-jaw chuck 1 is fixedly installed on the machine tool spindle 2 through a plurality of uniformly distributed butt bolts.

[0033] 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 principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A workpiece clamping mechanism for a pulley precision turning equipment, characterized in that: include: A three-jaw chuck (1) is fixedly mounted on the output shaft end of a machine tool spindle (2) and is used to clamp and fix a position of a pulley workpiece (3) where no belt mounting groove is provided; The clamping reinforcement mechanism (4) comprises a push rod (401) fixedly connected to the inner end of the jaws of the three-jaw chuck (1) in a stepped manner, the inner end of the push rod (401) is arranged in an inclined shape, a corresponding fixed shaft (402) is movably sleeved in the three-jaw chuck (1), the fixed shaft (402) is provided with an inclined slot (5) adapted to the push rod (401), and the push rod (401) is movably inserted into the inclined slot (5); a corresponding rubber sleeve (403) is fixedly sleeved on the fixed shaft (402) outside the push rod (401), the front end of the fixed shaft (402) is fixedly connected to a push plate (404) that can push the rubber sleeve (403), and the rubber sleeve A corresponding fixed ring plate (405) is fixedly provided at the rear end of (403); a rearward pulling force is formed on the fixed shaft (402) by an elastic member (406) provided at the rear end of the three-jaw chuck (1), so that the rear end face of the fixed ring plate (405) is fixedly abutted against the front end face of the push rod (401); the claws of the three-jaw chuck (1) are driven to move inwardly until they are pressed against a position where the corresponding pulley workpiece (3) is not provided with a belt mounting groove, and the push rod (401) moves inward accordingly to drive the fixed shaft (402) to move backward, and under the clamping action of the push plate (404) and the fixed ring plate (405), the rubber sleeve (403) is squeezed until it is rigidly pressed against the inner ring of the pulley workpiece (3).

2. A workpiece clamping mechanism for pulley finishing equipment according to claim 1, characterized in that: The rear end of the three-jaw chuck (1) is fixedly connected to a corresponding partition (6), and the center of the partition (6) is fixedly connected to a corresponding guide shaft (7) forward. The rear side of the fixed shaft (402) is provided with a guide hole adapted to the guide shaft (7), and the fixed shaft (402) is movably plugged into the guide shaft (7) through the cooperation between the guide hole and the guide shaft (7).

3. A workpiece clamping mechanism for pulley finishing equipment according to claim 2, characterized in that: The elastic member (406) is a coil spring, and the elastic member (406) is fixedly sleeved on the guide shaft (7), and the two ends of the elastic member (406) are respectively fixed to the partition (5) and the rear end surface of the fixed shaft member (402).

4. A workpiece clamping mechanism for pulley finishing equipment according to claim 1, characterized in that: The rubber sleeve (403) is evenly distributed with a plurality of corresponding through holes (8). When the rubber sleeve (403) is squeezed to be rigidly pressed against the inner ring of the pulley workpiece (3), the through holes (8) are compressed into micropores and abut against the inner wall of the pulley workpiece (3).

5. The workpiece clamping mechanism for pulley precision turning equipment according to claim 1, characterized in that: The push rod (401) is integrally formed and fixed to the jaws of the three-jaw chuck (1).

6. A workpiece clamping mechanism for pulley finishing equipment according to claim 1, characterized in that: The three-jaw chuck (1) is fixedly mounted on the machine tool spindle (2) via a plurality of evenly distributed butt bolts.

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