End face grinding chuck spindle device

Abstract

The utility model provides an end face grinding chuck spindle device, and belongs to the technical field of machining. The main shaft seat is arranged on the bottom plate, the main shaft bushing is fixed on the main shaft seat, outer rings of the first bearing and the second bearing are respectively fixed on two sides of the main shaft bushing, and the main shaft penetrates through the main shaft bushing and is linked with inner rings of the first bearing and the second bearing. A through channel allowing a workpiece to penetrate through is formed in the middle of the main shaft, one end of the main shaft is sleeved with a main shaft synchronous belt wheel, the other end of the main shaft is provided with a connecting structure fixedly connected with a workpiece chuck, a clamping structure is arranged on the workpiece chuck, and a hollow part communicated with the through channel in a matched mode is arranged in the middle of the workpiece chuck. The workpiece penetrates through the middle of the workpiece chuck and is clamped and fixed by the clamping structure. The utility model has the beneficial effects that the product consistency is good, the reject ratio is greatly reduced, and the production efficiency is higher.

Description

Technical Field

[0001] The utility model relates to a machining structure, in particular to a face grinding chuck spindle device. Background Art

[0002] The thimble is a slender component and is commonly used in machining. Its main uses are as follows: First, it can be used as a thimble plastic mold accessory in plastic molds to separate products from the molds, and is also called a push rod, insert pin, center pin, support pin, etc. Second, the center point used in a lathe is also called a thimble, which is a conical metal rod at the head used to support the workpiece and make the workpiece rotate around it. The end of the thimble usually needs to be ground flat by a thimble face grinding wheel to meet quality requirements such as perpendicularity.

[0003] With the increase in the company's business volume, the production department needs to continuously improve production efficiency. Traditional thimble face grinding mainly relies on processing on a surface grinder. The processing method is as follows: After the workpiece is clamped, it remains stationary, and the grinding wheel disc needs to rotate to achieve the grinding operation. However, when processing the thimble end face on this equipment, due to reasons such as the spindle structure and function of the equipment, during the grinding process of the end face, since the workpiece does not rotate, the consistency error of the end face support thickness dimension is relatively large, and out-of-tolerance and defective phenomena often occur. Therefore, it is necessary to improve the existing structure. Summary of the Utility Model

[0004] To solve the problems in the prior art, the utility model provides a face grinding chuck spindle device, which can make the workpiece rotate with the spindle during the grinding process, so that the support thickness dimension of the processed workpiece is more precise.

[0005] The utility model includes a bottom plate, a spindle seat arranged on the bottom plate, a spindle bushing fixed on the spindle seat, a first bearing and a second bearing whose outer rings are respectively fixed on both sides of the spindle bushing, and a spindle passing through the spindle bushing and linked with the inner rings of the first bearing and the second bearing.

[0006] A through channel for the workpiece to pass through is arranged in the middle of the spindle. One end of the spindle is sleeved with a spindle synchronous pulley, and the other end is provided with a connection structure fixedly connected with the workpiece chuck. A clamping structure is arranged on the workpiece chuck. A hollow part matching and communicating with the through channel is arranged in the middle of the workpiece chuck. The workpiece passes through the middle of the workpiece chuck and is clamped and fixed by the clamping structure.

[0007] The utility model is further improved in that the face grinding chuck spindle device further includes a synchronous belt driving structure for driving the spindle synchronous pulley to rotate.

[0008] The present utility model is further improved. The synchronous belt drive structure includes a reduction motor, a driving pulley arranged on the driving shaft of the reduction motor, and a synchronous belt arranged between the driving pulley and the main shaft synchronous pulley.

[0009] The present utility model is further improved. The end face grinding chuck main shaft device is vertically arranged. A plurality of support columns are arranged on the main shaft seat. A motor fixing plate is arranged above the support columns. The reduction motor is fixed on the upper surface of the motor fixing plate. The driving pulley and the main shaft synchronous pulley are arranged corresponding to each other vertically.

[0010] The present utility model is further improved. A protective cover for isolating the synchronous belt drive structure is arranged on the side surface of the main shaft seat.

[0011] The present utility model is further improved. The first bearing and the second bearing are respectively tapered roller bearings. The inner rings of the tapered roller bearings are sleeved on the main shaft and are connected with the main shaft in a limiting manner.

[0012] The present utility model is further improved. The workpiece chuck is a three-jaw chuck. The connecting structure is a fixed disc extending from the main shaft to the periphery. The size of the fixed disc is adapted to that of the three-jaw chuck. The fixed disc is fixedly connected with the three-jaw chuck by screws.

[0013] The present utility model is further improved. The fixed disc includes a protruding step surface and a fixing ring arranged on the periphery of the step surface. The three-jaw chuck includes a side wall and a functional groove arranged inside the side wall. The fixing ring is adapted to the side wall of the three-jaw chuck. The step surface is embedded in the functional groove to limit the installation of the three-jaw chuck.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows: Through the main shaft device of the present utility model, when grinding the end face of a workpiece on an end face machine, the workpiece chuck can be driven to rotate, and then the workpiece can be driven to rotate together, so that the product consistency of the end face of the workpiece processed by the present utility model is good, there will be no out-of-tolerance phenomenon in the product, and the rejection rate is greatly reduced. In addition, the end face size of the workpiece processed by the present utility model is more precise and the production efficiency is higher, thereby reducing the production cost and improving the competitiveness of the company's products in the market.

[0015] By arranging a through channel on the main shaft device, only the distance between one end of the end face and the end face machine needs to be maintained. The other end of the workpiece can extend wirelessly in another direction through the through channel, so as to be adapted to the processing of workpieces with different length dimensions without adjusting the end face machine, and further improving the processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of the present utility model;

[0017] Figure 2 This is a schematic diagram of the main shaft structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the back structure of the three-jaw chuck. DETAILED DESCRIPTION

[0019] The utility model is developed to ensure that when grinding the end face of a workpiece on an end face machine, the workpiece also rotates to ensure that the end face grinding process of the workpiece thickness is more precise and the production efficiency is higher, thereby reducing production costs and improving the competitiveness of the company's products in the market. The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0020] like Figure 1 and Figure 2 As shown, the end face grinding chuck spindle device of the utility model comprises a base plate 1, a spindle seat 10 arranged on the base plate 1, a spindle bushing 4 fixed on the spindle seat 10, and two bearings 2 whose outer rings are respectively fixed on both sides of the spindle bushing 4. In this example, a mounting portion is provided in the middle of the spindle seat 10, and the spindle bushing 4 is fixed in the mounting portion by two spindle bushing locking screws 5. The two bearings 2 are respectively a first bearing whose outer ring is fixedly connected to the left side of the spindle bushing 4 and a second bearing whose outer ring is fixedly connected to the right side of the spindle bushing 4. The spindle 11 passes through the spindle bushing 4, and is fixedly connected to the inner rings of the first bearing and the second bearing, and rotates together in linkage.

[0021] A through channel 111 is provided in the middle of the main shaft 11 for the workpiece 14 to pass through. A main shaft synchronous pulley 3 is sleeved on one end of the main shaft 11, and a connecting structure fixedly connected to a workpiece chuck 13 is provided at the other end. A clamping structure is provided on the workpiece chuck 13. A hollow portion matching and communicating with the through channel is provided in the middle of the workpiece chuck 13. The workpiece 14 passes through the middle of the workpiece chuck 13 and is clamped and fixed by the clamping structure.

[0022] Through the spindle device of the utility model, when the end face of the workpiece is ground on the end facing machine, the workpiece chuck can be driven to rotate, and then the workpiece is driven to rotate together, so that the end face products of the workpiece processed by the utility model have good consistency, the products will not have out-of-tolerance phenomena, and the defective rate is greatly reduced. In addition, the end face size of the workpiece processed by the utility model is more precise and the production efficiency is higher, thereby reducing production costs and improving the competitiveness of the company's products in the market.

[0023] By setting a through channel on the spindle device, it is only necessary to maintain the distance between one end of the end face and the end facing machine, and the other end of the workpiece can be wirelessly extended in another direction through the through channel, so that it can adapt to the processing of workpieces of different lengths and sizes without adjusting the end facing machine tool, thereby further improving the processing efficiency.

[0024] The spindle of the present utility model is driven to rotate by the spindle synchronous pulley and can be compatible with the synchronous belt structure on the machine tool. In this example, the synchronous belt drive structure for driving the spindle synchronous pulley to rotate is integrated on the end face grinding chuck spindle device. Specifically, the synchronous belt drive structure in this example includes a reduction motor 12, a driving wheel 9 provided on the drive shaft of the reduction motor, and a synchronous belt provided between the driving wheel 9 and the spindle synchronous pulley 3. In order to achieve personnel isolation and protection for the entire equipment in this example, a protective cover 6 for isolating the synchronous belt drive structure is provided on the side of the spindle base 10.

[0025] The reduction motor 12 of the present utility model drives the driving wheel 9 to rotate, and then drives the spindle synchronous pulley 3 through the synchronous belt, and further drives the workpiece 14 on the workpiece chuck 13 to rotate.

[0026] Preferably, the end face grinding chuck spindle device is arranged vertically. A plurality of support columns 7 are provided on the spindle base 10, and a motor fixing plate 8 is provided above the support columns 7. The reduction motor 12 is fixed on the upper surface of the motor fixing plate 8, and the driving wheel 9 and the spindle synchronous pulley 3 are arranged corresponding to each other vertically. Since a large amount of heat will be generated during the end face grinding process, water cooling is required to reduce the temperature. In this example, the reduction motor is fixed above the entire device to avoid contact with the sprayed cooling water during the processing, separating water and electricity, and having higher safety.

[0027] Preferably, the first bearing and the second bearing in this example are respectively tapered roller bearings. The inner rings of the tapered roller bearings are sleeved on the spindle and are connected with the spindle 11 in a limiting manner.

[0028] Tapered roller bearings mainly bear the combined radial and axial loads mainly in the radial direction. The bearing capacity of the bearing depends on the raceway angle of the outer ring. The larger the angle, the greater the bearing capacity. This type of bearing belongs to a separable bearing. Tapered roller bearings have conical inner and outer ring raceways, and tapered rollers are arranged between them. The projection lines of all conical surfaces meet at the same point on the bearing axis. This design makes tapered roller bearings particularly suitable for bearing combined (radial and axial) loads. The axial load capacity of the bearing is mostly determined by the contact angle α. The larger the α angle, the higher the axial load capacity. The size of the angle is represented by the calculation coefficient e. The larger the e value, the larger the contact angle, and the greater the applicability of the bearing to bear axial loads. The use of tapered roller bearings makes the spindle of the present utility model run more stably.

[0029] As Figures 1 - 3 shown, the workpiece chuck 13 is a three-jaw chuck, and the connecting structure is a fixed disc extending from the spindle to the periphery. The size of the fixed disc is adapted to the three-jaw chuck, and the fixed disc is fixedly connected to the three-jaw chuck by screws.

[0030] Specifically in this example, the fixed disk of this example includes a protruding stepped surface 112 and a fixing ring 113 arranged on the periphery of the stepped surface. The three-jaw chuck includes a side wall 131 and a functional groove 133 arranged inside the side wall 131. A spur gear 134 and three small bevel gears 135 are arranged in the functional groove 133 to drive the three jaws 136 to move towards the center to clamp the workpiece 14, or move away to loosen the workpiece. The fixing ring 113 is adapted to the end face of the side wall 131 of the three-jaw chuck, and the stepped surface 112 is embedded in the functional groove 133 to limit the installation of the three-jaw chuck. In addition, three screw holes 114 are provided on the fixing ring 113, and threaded holes 132 that are matched and fixed with the screw holes 114 are provided at corresponding positions on the end face of the side wall 131 of the three-jaw chuck, and the two are locked and fixed by three screws.

[0031] Compared with the existing surface grinder, the main shaft device of this surface grinding chuck has the advantages of simple structure and low cost, and can better ensure the precision of the thickness dimension of the thimble support when grinding the end face of the thimble. The existing surface grinder clamps the workpiece by directly pressing the material with a cylinder. Due to reasons such as the clamping method and structure of the equipment, the workpiece does not rotate when grinding the end face of the workpiece, resulting in low end face grinding accuracy and low work efficiency. However, the main shaft device of this surface grinding chuck changes the state where the workpiece does not rotate when grinding the end face, and rotates in two opposite directions, making it more precise when grinding the end face of the support part of the workpiece. The structure of this equipment is relatively simple, easy to operate, and has high work efficiency.

[0032] The above-described specific implementation manners are the preferred implementation manners of the present invention, and do not limit the specific implementation scope of the present invention. The scope of the present invention includes but is not limited to this specific implementation manner. All equivalent changes made in accordance with the present invention are within the protection scope of the present invention.

Claims

1. An end face grinding chuck spindle device, characterized in that: It includes a base plate, a spindle seat arranged on the base plate, a spindle bushing fixed on the spindle seat, a first bearing and a second bearing whose outer rings are respectively fixed on both sides of the spindle bushing, and a spindle passing through the spindle bushing and linked with the inner rings of the first bearing and the second bearing. A through channel is provided in the middle of the spindle for the workpiece to pass through. A spindle synchronous pulley is sleeved on one end of the spindle, and a connecting structure fixedly connected to a workpiece chuck is provided at the other end. A clamping structure is provided on the workpiece chuck. A hollow portion matching and communicating with the through channel is provided in the middle of the workpiece chuck. The workpiece passes through the middle of the workpiece chuck and is clamped and fixed by the clamping structure.

2. The end face grinding chuck spindle device according to claim 1, characterized in that: The end face grinding chuck spindle device also includes a synchronous belt driving structure for driving the spindle synchronous belt wheel to rotate.

3. The end face grinding chuck spindle device according to claim 2, characterized in that: The synchronous belt driving structure includes a reduction motor, a driving wheel arranged on the driving shaft of the reduction motor, and a synchronous belt arranged between the driving wheel and the main shaft synchronous belt wheel.

4. The end face grinding chuck spindle device according to claim 3, characterized in that: The end face grinding chuck spindle device is arranged vertically, a plurality of support columns are arranged on the spindle seat, a motor fixing plate is arranged above the support columns, the reduction motor is fixed on the upper surface of the motor fixing plate, and the driving wheel and the spindle synchronous pulley are arranged correspondingly up and down.

5. The end face grinding chuck spindle device according to claim 4, characterized in that: A protective cover is provided on the side of the main shaft seat to isolate the synchronous belt driving structure.

6. The end face grinding chuck spindle device according to any one of claims 1 to 5, characterized in that: The first bearing and the second bearing are respectively tapered roller bearings, and the inner ring of the tapered roller bearing is sleeved on the main shaft and is limitedly connected to the main shaft.

7. The end face grinding chuck spindle device according to any one of claims 1 to 5, characterized in that: The workpiece chuck is a three-jaw chuck, and the connection structure is a fixed disk extending from the main shaft to the outer periphery. The size of the fixed disk is adapted to the three-jaw chuck, and the fixed disk is fixedly connected to the three-jaw chuck by screws.

8. The end face grinding chuck spindle device according to claim 7, characterized in that: The fixed disc includes a raised step surface and a fixed ring arranged on the periphery of the step surface; the three-jaw chuck includes a side wall and a functional groove arranged inside the side wall; the fixed ring is adapted to the side wall of the three-jaw chuck; the step surface is embedded in the functional groove to limit the installation of the three-jaw chuck.

Images