CN204893598U - Processing grinding machine of taper hole - Google Patents

Abstract

The utility model provides a grinding machine for processing taper holes, which includes a feed mechanism, a grinding mechanism and a clamping mechanism. The feed mechanism and the grinding mechanism are respectively provided with two independent groups, and each group of grinding mechanisms includes a second motor and the grinding wheel, the two second motors are respectively fixedly connected with an independent group of feed mechanisms, and their output shafts are respectively connected and fixed to the grinding wheel. The central axes of the two grinding wheels coincide and their grinding surfaces stand opposite each other. The surfaces are all conical surfaces consistent with the taper of the taper hole to be processed, and the clamping mechanism is fixedly installed on the grinding machine base and located between the two grinding wheels. Using the utility model to process the taper hole is a form grinding method. Only one clamping operation is required on the workpiece, and the simultaneous processing of the taper holes at both ends of the workpiece can be realized, which greatly improves the forming process efficiency and efficiency of the taper hole on the workpiece. The machining accuracy, and the coaxiality of the taper holes at both ends of the workpiece can reach 0.01, which fully meets the coaxiality requirements of the taper holes at both ends of the workpiece.

Description

A processing grinder for tapered holes

technical field

The utility model relates to the technical field of deep processing of taper holes on cemented carbide workpieces, in particular to a processing grinder for taper holes.

Background technique

The deep processing of cemented carbide workpieces is carried out by grinding, and the deep processing of taper holes on the workpiece is no exception. As for the processing of the tapered holes 101 at both ends of the workpiece 1 as shown in FIG. 1 , most of them use tool grinders for grinding at present. The specific processing method is shown in FIG. 2 . During grinding, the workpiece 1 to be processed is clamped on the mandrel of the tool grinder, and the mandrel is clamped on the headstock 3 of the grinder. According to the taper requirements of the tapered hole 101, the grinding machine headstock 3 is deviated to a certain angle. When grinding, rely on the reciprocating motion of the grinding machine table 2, the rotary motion of the grinding machine headstock 3, the rotary motion of the grinding head 4, and the rotation of the grinding head 4. The feed motion completes the grinding process of the tapered hole 101 . After grinding the tapered hole 101 at one end of the workpiece 1, the grinding machine stops, and the operator turns over the workpiece 1, and then grinds the tapered hole 101 at the other end of the workpiece 1 according to the above grinding method until the workpiece 1 The tapered holes 101 at both ends are finished.

The above-mentioned grinding method has the following two defects:

One is, after the tapered hole 101 at one end of the workpiece 1 is processed, the grinding machine equipment needs to be stopped, and the tapered hole 101 at the other end of the workpiece 1 is ground after the workpiece 1 is turned over. When the angles are different, it is necessary to adjust the grinding machine headstock 3 and its feed rate, or use two tool grinders for grinding, and each tool grinder only grinds the tapered hole 101 on one end face of the workpiece 1. Therefore, the grinding process The efficiency is relatively low.

Second, when the concentricity tolerance d of the tapered holes 101 at both ends of the workpiece 1 is 0.05 mm, the above-mentioned processing method cannot meet the technological requirements of the tapered holes 101 on the workpiece 1 due to low machining accuracy and poor control during processing.

Utility model content

The technical problem to be solved by the utility model is: aiming at the problems existing in the prior art, a grinding machine for processing taper holes is provided, which improves the processing efficiency and precision of the taper holes at both ends of the workpiece, and ensures the coaxiality of the taper holes at both ends of the workpiece. Require.

The technical problem to be solved by the utility model is realized by the following technical solutions: a processing grinding machine for tapered holes, including a feed mechanism, a grinding mechanism and a clamping mechanism, and the feed mechanism and the grinding mechanism are respectively provided with two independent groups , each group of grinding mechanism includes a second motor and a grinding wheel, the two second motors are respectively fixedly connected with an independent group of feeding mechanisms, and their output shafts are respectively connected and fixed to the grinding wheel, the central axes of the two grinding wheels coincide and their grinding The beveled surfaces stand opposite each other, and the grinding surfaces of the two grinding wheels are all conical surfaces consistent with the taper of the taper hole to be processed. The clamping mechanism is fixedly installed on the grinding machine base and is located between the two grinding wheels.

Preferably, each set of feed mechanisms includes a first motor, a ball screw, a transmission member and a worktable, the output shaft of the first motor is connected and fixed to the ball screw, and the ball screw and the transmission member are movable Sleeve, the transmission part is fixedly connected with the workbench, and the second motor is fixedly installed on the workbench.

Preferably, the output shaft of the first motor is connected and fixed to the ball screw through a coupling.

Preferably, the first motor is a servo motor.

Preferably, the grinding wheel is fixedly connected to one end of the grinding wheel shaft, and the other end of the grinding wheel shaft is fixedly connected to the output shaft of the second motor.

Preferably, one end of the grinding wheel shaft is provided with threads, and the grinding wheel is fixedly connected to the grinding wheel shaft by forming a threaded flexible connection with the grinding wheel shaft through a lock nut.

Preferably, the clamping mechanism is composed of a clamping bracket and a set screw to form a threaded flexible connection. The clamping bracket is fixedly connected to the grinder base and is located between two grinding wheels. A through hole is installed, and the through hole coincides with the central axes of the two grinding wheels.

Preferably, a stop step is provided in the installation through hole on the clamping bracket.

Preferably, the clamping mechanism further includes a bush and a set screw that form a threaded flexible connection, the bush is installed in the installation through hole on the clamping bracket, and the workpiece clamping through hole is opened on the bush, The clamping through hole coincides with the central axes of the two grinding wheels.

Preferably, a stop step is provided in the workpiece clamping through hole on the bush.

Compared with the prior art, the beneficial effect of the utility model is: since the processing grinder of the utility model has two feeding mechanisms and two grinding mechanisms, and the central axes of the grinding wheels in the two grinding mechanisms coincide, its The grinding surfaces stand opposite each other, and the grinding surfaces of the two grinding wheels are all conical surfaces consistent with the taper of the taper hole to be processed. The clamping mechanism is fixedly installed between the two grinding wheels. The workpiece is fixed by the clamping mechanism and is always fixed relative to the grinding machine base. Moreover, the workpiece to be processed does not rotate during the grinding process, but only through the rotation of the grinding wheel and the opposite feeding action. , the taper hole can be processed synchronously on the workpiece. Therefore, this form grinding method can realize the synchronous processing of the taper holes at both ends of the workpiece through one clamping operation of the workpiece. The size and angle of the taper hole on the workpiece can be Relying on the forming grinding wheel can ensure that even if the specification of the tapered hole on the workpiece changes, it is only necessary to design or select a forming grinding wheel with a different grinding cone surface according to the size and angle required by the tapered hole on the workpiece, thus greatly improving the workpiece surface. The processing efficiency and processing accuracy of the tapered hole, and the coaxiality of the tapered holes at both ends of the workpiece can reach 0.01, which can fully meet the coaxiality requirements of the tapered holes at both ends of the workpiece.

Description of drawings

Figure 1 is a structural diagram of a tapered hole.

Fig. 2 is a schematic diagram of the processing method of the tapered hole shown in Fig. 1 (before improvement).

Fig. 3 is a structural diagram of a grinding machine for machining taper holes of the present invention.

Figure 4 is a schematic diagram of a machining method for a tapered hole.

Marks in the figure: 1-workpiece, 2-table, 3-grinding machine head frame, 4-grinding head, 5-first motor, 6-second motor, 7-grinding wheel shaft, 8-grinding wheel, 9-set screw , 10-bush, 11-clamping bracket, 12-lock nut, 13-transmission member, 14-ball screw, 15-coupling, 16-base, 101-taper hole.

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

A kind of processing grinder of taper hole as shown in Figure 3, comprises feed mechanism, grinding mechanism and clamping mechanism, described feed mechanism is provided with independent two groups, and each group of feed mechanism comprises first motor 5, The ball screw 14, the transmission member 13 and the workbench 2, the first motor 5 and the ball screw 14 are all distributed on the two ends of the machine base 16 with the central axis of the grinding machine base 16 as a symmetrical axis. 16 in the feed mechanism at the same end, the output shaft of the first motor 5 and the ball screw 14 are connected and fixed through a coupling 15, the ball screw 14 is movably socketed with the transmission member 13, and the transmission member 13 It is fixedly connected with workbench 2. The workbench 2 is located at the top of the machine base 16. When the first motor 5 drives the ball screw 14 to rotate, the ball screw 14 drives the transmission part 13 to move horizontally and linearly, and the drive part 13 drives the workbench 2 relative to the machine base 16. It also synchronizes the horizontal linear motion to realize the feed action of the grinding machine.

The grinding mechanism is also provided with independent two groups, and each group of grinding mechanism includes a second motor 6 and a grinding wheel 8, and the two second motors 6 are respectively fixedly mounted on an independent workbench 2, and their output shafts are connected to the grinding wheel respectively. 8 are fixedly connected; the central axes of the two grinding wheels 8 coincide and their grinding surfaces stand oppositely, and the grinding surfaces of the two grinding wheels 8 are all conical surfaces consistent with the taper of the taper hole to be processed.

The clamping mechanism is fixedly installed on the grinding machine base 16 and is located between the two grinding wheels 8. Specifically, the clamping mechanism is formed by a clamping bracket 11 and a set screw 9 that are threaded and flexibly connected. The clamping bracket 11 is fixedly connected to the grinding machine base 16 and is located between the two grinding wheels 8 . An installation through hole is provided on the clamping bracket 11 . The installation through hole coincides with the central axes of the two grinding wheels 8 .

When the above-mentioned grinding machine is used for grinding the taper hole, the specific operation steps are as follows:

First, as shown in FIG. 3 , the workpiece 1 to be processed is installed on the clamping bracket 11 , and then the workpiece 1 is clamped and fixed by the set screw 9 . In order to ensure that the clamping of the workpiece 1 is firm and reliable, and to protect the outer surface of the workpiece 1 from scratches, bruises and other processing defects during the grinding process, a bushing 10 and a set screw 9 can also be added. The bushing 10 and the set screw 9 also form a threaded flexible connection. The bushing 10 is installed in the installation through hole on the clamping bracket 11, and the workpiece clamping through hole is opened on the bushing 10. The clamping holes coincide with the central axes of the two grinding wheels 8, so that the workpiece 1 to be processed can be clamped and fixed on the bushing 10.

Then, start the two first motors 5 to make the two workbenches 2 gradually move horizontally towards the workpiece 1 until the grinding wheels 8 at both ends of the workpiece 1 approach the two ends of the workpiece 1 in opposite directions.

Next, start the two second motors 6, and the grinding wheel 8 will rotate relative to the workpiece 1. By using the mutual cooperation of the rotation of the two grinding wheels 8 and the opposite feeding action, the tapered hole can be processed synchronously on the workpiece 1. 101, as shown in Figure 4. After the processing is completed, the second motor 6 stops working, respectively adjust the first motor 5 on both sides of the workpiece 1 to work in reverse, so that the grinding wheels 8 on both sides of the workpiece 1 leave the workpiece 1 to a suitable position, loosen the set screw 9, and take out Workpiece 1 is enough.

During the above-mentioned grinding process of the tapered hole 101, in order to ensure the stability of the feeding action of the two grinding wheels 8 and to ensure the machining accuracy of the tapered hole 101, the first motor 5 is preferably a servo motor. Since the grinding wheel 8 is grinding, its tapered grinding surface will be continuously worn out, thereby reducing the machining accuracy of the tapered hole 101, and it is necessary to replace a qualified forming grinding wheel in time. In order to facilitate the replacement of the grinding wheel 8, and at the same time ensure that other working parts of the grinding machine do not need to be adjusted when the grinding wheel 8 is replaced, the grinding wheel 8 can be fixedly connected to one end of the grinding wheel shaft 7, specifically, a threaded connection is provided at one end of the grinding wheel shaft 7, so The grinding wheel 8 can be fixedly connected to the grinding wheel shaft 7 through the locking nut 12 and the grinding wheel shaft 7 to form a threaded flexible connection, and the other end of the grinding wheel shaft 7 is fixedly connected to the output shaft of the second motor 6. By connecting the grinding wheel shaft 7 is integrated with the main shaft motor, that is, the second motor 6 to form an electric main shaft, as shown in Fig. 3 and Fig. 4 . The electric spindle is a kind of grinding head, which drives the grinding wheel 8 to rotate at high speed.

Considering that during the grinding process, since the grinding force between the grinding wheel 8 and the workpiece 1 is relatively large, both the workpiece 1 and the grinding wheel 8 may have axial and radial movement, and this movement will be extremely The machining accuracy of the tapered hole 101 is greatly reduced. In order to ensure the machining accuracy of the tapered hole 101, as shown in Figure 3 and Figure 4, a stop step can be set in the installation through hole on the clamping bracket 11, and a stop step can be set in the workpiece clamping through hole on the bushing 10. Steps, the workpiece 1 can be axially limited by the stop steps. Simultaneously, when grinding, after two second motors 6 can be set to start, the rotation directions of the two grinding wheels 8 are opposite. The active force will be partially offset, thereby effectively reducing the axial and radial movement of the workpiece 1 and the grinding wheel 8, which is conducive to improving the machining accuracy of the tapered hole 101 and ensuring the machining pass rate.

To sum up, since the central axes of the two grinding wheels 8 coincide, their grinding surfaces stand opposite each other, and the grinding surfaces of the two grinding wheels 8 are all conical surfaces consistent with the taper of the taper hole 101 to be processed. At this time, the workpiece 1 to be processed does not perform rotational movement during the grinding process, but the two grinding wheels 8 move towards each other for horizontal feed movement, and at the same time perform rotational movement relative to the workpiece 1, so as to respectively grind the two ends of the workpiece 1. Synchronous grinding, this form grinding method only needs to perform one-time clamping operation on the workpiece 1 to realize the synchronous processing of the taper holes 101 at both ends of the workpiece 1, and the size and angle of the taper holes 101 can depend on Forming grinding wheel 8 is guaranteed. Even when the tapered hole 101 specifications are changed, it is only necessary to design or select the forming grinding wheel 8 for different grinding cone surfaces according to the required size and angle of the tapered hole 101. Therefore, the performance of the tapered hole 101 on the workpiece 1 is greatly improved. Forming processing efficiency and processing accuracy, and the coaxiality of the tapered holes 101 at both ends of the workpiece 1 can reach 0.01, which can fully meet the coaxiality requirements of the tapered holes 101 at both ends of the workpiece. Even if the size and angle of the tapered holes 101 at both ends of the workpiece 1 are inconsistent, when the grinding machine of the utility model is used to grind the tapered holes 101, the processing efficiency can be improved by at least 2 times, and the tapered holes 101 at the two ends of the workpiece 1 The concentricity can be controlled within 0.01.

The above is only a preferred embodiment of the utility model, and is not intended to limit the utility model. It should be pointed out that any modification, equivalent replacement and improvement made within the spirit and principles of the utility model, etc., All should be included within the protection scope of the present utility model.

Claims (10)

1. a kind of processing grinder of taper hole, comprise feed mechanism, grinding mechanism and clamping mechanism, it is characterized in that: described feed mechanism, grinding mechanism are respectively provided with independent two groups, and each group of grinding mechanism comprises the first Two motors (6) and grinding wheel (8), two second motors (6) are respectively fixedly connected with an independent group of feeding mechanisms, and their output shafts are respectively connected and fixed with grinding wheels (8), and the two grinding wheels (8) The central axis coincides and its grinding surfaces stand oppositely. The grinding surfaces of the two grinding wheels (8) are all conical surfaces consistent with the taper of the taper holes to be processed. The clamping mechanism is fixedly installed on the grinding machine base ( 16) and between the two grinding wheels (8). 2. The processing grinding machine for a kind of tapered hole according to claim 1, characterized in that: each group of said feed mechanism comprises a first motor (5), a ball screw (14) and a transmission member (13) and the workbench (2), the output shaft of the first motor (5) is connected and fixed with the ball screw (14), and the ball screw (14) is movably socketed with the transmission part (13), and the transmission part ( 13) It is fixedly connected with the workbench (2), and the second motor (6) is fixedly installed on the workbench (2). 3. A grinding machine for processing tapered holes according to claim 2, characterized in that: the output shaft of the first motor (5) and the ball screw (14) are connected and fixed through a coupling (15). 4. The machining and grinding machine for tapered holes according to claim 2 or 3, characterized in that the first motor (5) is a servo motor. 5. The grinding machine for processing a tapered hole according to any one of claims 1-3, characterized in that: the grinding wheel (8) is fixedly connected to one end of the grinding wheel shaft (7), and the grinding wheel shaft (7) The other end is fixedly connected with the output shaft of the second motor (6). 6. A grinding machine for processing tapered holes according to claim 5, characterized in that: one end of the grinding wheel shaft (7) is threaded, and the grinding wheel (8) is connected to the grinding wheel shaft (7) through a lock nut (12). ) to form a threaded movable connection and be fixedly connected on the grinding wheel shaft (7). 7. A grinding machine for processing tapered holes according to any one of claims 1-3, characterized in that: the clamping mechanism is composed of a clamping bracket (11) and a set screw (9) that are threaded and flexibly connected Formed, the clamping bracket (11) is fixedly connected on the grinding machine base (16) and is located between the two grinding wheels (8), and an installation through hole is opened on the clamping bracket (11), and the installation through hole Coincident with the central axes of the two grinding wheels (8). 8. A grinding machine for processing tapered holes according to claim 7, characterized in that: a stop step is provided in the installation through hole on the clamping bracket (11). 9. A processing grinding machine for tapered holes according to claim 7, characterized in that: the clamping mechanism also includes a bushing (10) and a set screw (9) forming a threaded movable connection, the bushing The sleeve (10) is installed in the installation through hole on the clamping bracket (11), and the workpiece clamping through hole is opened on the bushing (10), and the clamping through hole coincides with the central axes of the two grinding wheels (8) . 10. The grinding machine for processing tapered holes according to claim 9, characterized in that: a stop step is provided in the workpiece clamping through hole on the bush (10).