CN102672507B - Manual auxiliary supporting mechanism - Google Patents

Abstract

The invention discloses a manual auxiliary support mechanism, comprising: a support 18, fixedly installed on a clamp body 20, inside the support has a cavity through up and down; a guide sleeve 15, fixedly installed in the cavity of the support, guide The sleeve has a central through hole; the push rod 21 has a rod body and a rod end, the rod body is slidably installed in the central through hole, and the rod end is located below the guide sleeve; the spring 19 is located in the cavity, One end abuts against the rod end, and the other end abuts against the clamp body; the lower end of the support column 14 is installed in the installation groove of the rod body, and the upper end is used to support the workpiece 10; the locking screw 16 runs through the support, the guide sleeve, Push rod, lock or loosen the support column. The invention can automatically adjust the auxiliary support force, automatically adapt to the height error of the support plane of the blank workpiece, solve the problem of inconvenient time-consuming and laborious adjustment of the rigid auxiliary support point, and avoid the vibration of the auxiliary support point caused by the change of the cutting force.

Description

Manual auxiliary support mechanism

technical field

The invention relates to the field of machining, in particular to a manual auxiliary support mechanism for machining long workpieces.

Background technique

In the process of part processing, if the cutting force of the processing tool in the process is large (such as the rough milling process of the workpiece), and the length of the processed part is long (such as the engine block, cylinder head, rear axle housing of the car), Then, during the processing, the workpiece is prone to deflection deformation, which often leads to very poor flatness accuracy of the processed workpiece plane, which will directly lead to the failure of the processed workpiece.

The common solution now is to add an auxiliary support mechanism on the workpiece support surface. For fixtures with a hydraulic system, a hydraulic auxiliary support unit is generally added, but for small batch processing and trial production workpieces, manual is often used. There is no hydraulic system for clamps and manual clamps, and the hydraulic auxiliary support unit cannot be used, and the hydraulic auxiliary support is expensive. Therefore, many manufacturers often add rigid support points to solve the deflection deformation during the processing of small batches of workpieces, but there are two problems as follows:

1. The supporting force of the rigid auxiliary support point is relatively large, and the size of the force cannot be adjusted, which is not effective in reducing the deflection deformation of the workpiece during processing, and cannot ensure the flatness of the processed workpiece;

2. If there is a deviation in the height of the support plane of the workpiece blank, the overall height of the rigid auxiliary support point must be readjusted every time a piece is processed, which is time-consuming and laborious.

Contents of the invention

The purpose of the embodiment of the present invention is to provide a manual auxiliary support mechanism, which can automatically adjust the auxiliary support force, automatically adapt to the height error of the support plane of the blank workpiece, solve the problem of inconvenient adjustment of the rigid auxiliary support point, time-consuming and laborious, and avoid the problem of The vibration problem of the auxiliary support point caused by the change of cutting force.

In order to achieve the above object, the present invention provides a manual auxiliary support mechanism, comprising:

The support 18 is fixedly mounted on the clamp body 20, and the support 18 has a cavity through it up and down;

The guide sleeve 15 is fixedly installed in the cavity of the support 18, and the guide sleeve 15 has a central through hole;

The push rod 21 has a rod body and a rod end, the rod body is slidably installed in the central through hole, and the rod end is located below the guide sleeve 15;

The spring 19 is located in the cavity, with one end abutting against the rod end and the other end abutting against the clamp body 20;

The support column 14, the lower end is installed in the installation groove of the rod body, and the upper end is used to support the workpiece 10;

The locking screw 16 passes through the support 18, the guide sleeve 15, and the push rod 21, and locks or loosens the support column 14;

The nut 13 for adjusting the height of the support column 14 is sleeved on the support column 14 .

Preferably, in the aforementioned manual auxiliary support mechanism, a roller 12 is installed on the upper end of the support column 14 , and the workpiece 11 is supported by the roller 12 .

Preferably, in the aforementioned manual auxiliary support mechanism, the lower end of the support column 14 has a locking side surface 141 that cooperates with the locking screw 16 .

Preferably, in the aforementioned manual auxiliary support mechanism, the guide sleeve 15 is fixedly installed in the cavity through interference fit.

Preferably, the above-mentioned manual auxiliary support mechanism further includes: a second locking screw 17 passing through the support 18 and locking the guide sleeve 15 .

Preferably, in the aforementioned manual auxiliary support mechanism, the guide sleeve 15 has a locking side groove 151 matched with the second locking screw 17 .

Preferably, in the aforementioned manual auxiliary support mechanism, the rod end of the push rod 21 has:

A first boss 211 for being sleeved on the inner ring of the spring;

The second boss 212 for socket positioning is located on the first boss.

Embodiments of the present invention at least have the following technical effects:

1) For different blank workpieces, even if there is a deviation in the height of the support plane of the workpiece, there is no need to adjust the support 18 and the clamp body 20. The spring will automatically expand and contract to adapt to the height of the support plane while providing auxiliary support force, so when replacing the blank After the workpiece, the adjustment time of the auxiliary support point is greatly reduced.

2) After the spring adapts to the height of the support plane of the blank workpiece, the ejector rod 21 is locked by the locking screw 16 to prevent the vibration of the auxiliary support point caused by the change of the cutting force during the cutting process, which can better ensure the machining accuracy.

3) The auxiliary support point is in contact with the workpiece 11 through the roller 12. When clamping, the long workpiece can be directly pushed on the roller of the auxiliary support point. During the processing, the long workpiece is caused by cutting force or thermal expansion and contraction. When axially deformed, the roller can adapt to this deformation to avoid scratching the workpiece being processed.

4) The manual auxiliary support mechanism of the present invention is small in size, easy to install and use, low in cost and good in effect.

Description of drawings

FIG. 1 is a structural diagram of a manual auxiliary support mechanism provided by an embodiment of the present invention;

Fig. 2 is a partial view of direction A in Fig. 1;

Fig. 3 is a structural diagram of a support column provided by an embodiment of the present invention;

Fig. 4 is the sectional view of B-B direction in Fig. 3;

Fig. 5 is a structural diagram of a guide sleeve provided by an embodiment of the present invention;

Fig. 6 is a structural diagram of a push rod provided by an embodiment of the present invention;

Fig. 7 is a sectional view of C-C direction in Fig. 6;

Fig. 8 is a bottom view of the ejector rod provided by the embodiment of the present invention;

Fig. 9 is a top view of the support provided by the embodiment of the present invention;

Fig. 10 is a cross-sectional view along D-D in Fig. 9 .

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, specific embodiments will be described in detail below with reference to the accompanying drawings.

Fig. 1 is a structural diagram of the manual auxiliary support mechanism provided by the embodiment of the present invention. As shown in Fig. 1, the manual auxiliary support mechanism provided by the embodiment of the present invention includes:

The support 18 is fixedly mounted on the clamp body 20, and the support 18 has a cavity through it up and down;

The guide sleeve 15 is fixedly installed in the cavity of the support 18, and the guide sleeve 15 has a central through hole;

The push rod 21 has a rod body and a rod end, the rod body is slidably installed in the central through hole, and the rod end is located below the guide sleeve 15;

The spring 19 is located in the cavity, with one end abutting against the rod end and the other end abutting against the clamp body 20;

The support column 14, the lower end is installed in the installation groove of the rod body, and the upper end is used to support the workpiece 11;

The locking screw 16 passes through the support 18 , the guide sleeve 15 and the push rod 21 to lock or loosen the support column 14 .

It can be seen that the embodiment of the present invention designs an elastic manual auxiliary support mechanism according to the principle that the spring force can be self-adjusted. When working, the spring force is transmitted to the workpiece 11 by the spring 19 through the push rod 21 and the support column 14, because the spring For different blank workpieces, even if there is a deviation in the height of the support plane of the workpiece, there is no need to adjust the support 18 and the clamp body 20. The spring will automatically expand and contract to adapt to the height of the support plane while providing auxiliary support force, so After replacing the blank workpiece, the adjustment time of the auxiliary support point is greatly reduced.

Moreover, after the spring adapts itself to the height of the support plane of the blank workpiece, the ejector rod 21 is locked by the locking screw 16 to prevent the vibration of the auxiliary support point caused by the change of the cutting force during the cutting process, which can better ensure the machining accuracy.

Fig. 2 is a partial view of A direction in Fig. 1, as shown in Fig. 2, the described upper end of described support column 14 is equipped with roller 12, and roller 12 is pivotally connected by pin 22, directly abuts against support by roller 12 Described workpiece 11.

It can be seen that in the embodiment of the present invention, the auxiliary support point is in contact with the workpiece 11 through the roller 12. The advantage is that the clamping of the workpiece is convenient. When clamping, the long workpiece can be directly pushed on the roller of the auxiliary support point without scratching. The workpiece will not damage the auxiliary support point; during the processing, when the long workpiece is axially deformed due to cutting force or thermal expansion and contraction, the roller can adapt to this deformation to avoid scratching the workpiece being processed.

Fig. 3 is a structural diagram of a support column provided by an embodiment of the present invention, and Fig. 4 is a cross-sectional view of B-B direction in Fig. 3 , as shown in Fig. 3 and Fig. 4 , the lower end of the support column 14 is provided with the locking screw 16 mating locking sides 141 .

In a preferred embodiment of the present invention, it further includes: a nut 13 (as shown in FIG. 1 ) for adjusting the height of the support column 14 , which is sleeved on the support column 14 .

In a preferred embodiment of the present invention, the guide sleeve 15 is fixedly installed in the cavity through interference fit. The manual auxiliary support mechanism further includes: a second locking screw 17 (as shown in FIG. 1 ), passing through the support 18 and locking the guide sleeve 15 .

FIG. 5 is a structural diagram of the guide sleeve provided by the embodiment of the present invention. As shown in FIG. 5 , the guide sleeve 15 has a locking side groove 151 that cooperates with the second locking screw 17 .

Fig. 6 is a structural diagram of the ejector rod provided by the embodiment of the present invention, Fig. 7 is a sectional view of C-C direction in Fig. 6, and Fig. 8 is a bottom view of the ejector rod, as shown in Fig. 6, Fig. 7 and Fig. 8, the ejector rod 21 The rod end has: a first boss 211 for socketing on the spring inner ring; a second boss 212 for socketing and positioning, located on the first boss.

Fig. 9 is a top view of the support provided by the embodiment of the present invention, and Fig. 10 is a cross-sectional view along the direction D-D in Fig. 9 . As shown in FIGS. 9 and 10 , the support has a first threaded hole 181 matched with the locking screw 16 and a second threaded hole 182 matched with the second locking screw 17 .

Except the fastening screw, pin 22, locking screw 16, locking screw 17, spring 19 and nut 13 of the national standard, the parts used in the embodiment of the present invention are all special parts, which are specially designed and make.

During the processing of the workpiece 11, in order to reduce the deflection and deformation of the workpiece 11 due to the cutting force, the manual auxiliary support mechanism is installed on the clamp body 20, and the height of the support column 14 and the size of the support force are adjusted by the spring 19 , the height of the support column 14 will be higher than the support plane of the workpiece 11. After the workpiece 11 falls on the workpiece support plane, the support column 14 will give the workpiece 11 an upward support force under the action of the elastic force of the spring 19. This support force Part of the cutting force of the tool will be offset to balance the force on the workpiece and reduce the deflection and deformation of the workpiece 11 during processing, thereby ensuring the processing accuracy of the workpiece 11 .

It should be noted that when the workpiece 11 falls on the workpiece support plane, the roller 12 on the support column 14 contacts the bottom surface of the workpiece, and gives an upward support force to the workpiece 11 under the action of the spring 19, but during the workpiece processing, Due to the change of the cutting force of the tool, the support column 14 will float up and down, causing the workpiece to vibrate, and finally affect the machining accuracy of the workpiece 11. Therefore, after the workpiece 11 falls on the workpiece support plane and before the workpiece 11 is processed, the locking screw needs to be adjusted 16. Lock the support column 14 to prevent the support column 14 from floating up and down.

In the embodiment of the present invention, the guide sleeve 15 is installed on the support 18 with an interference fit, and is locked with a locking screw 17, and the roller 12 is connected to the support column 14 with a pin 22, and the support column 14 is connected with the ejector rod 21 with clearance fit. , then the spring 19 and the push rod 21 are installed, and finally the whole structure is installed on the clamp body 20 with screws, and the height of the support column 14 is adjusted before the formal processing, and the processing can be carried out.

It can be seen that, unlike the traditional rigid auxiliary support, the size of the support force of the present invention can be adjusted by adjusting the size of the spring force, and for workpieces with deviations in the height of the blank support plane, it is not necessary to frequently adjust the height of the support point. The size of the auxiliary supporting force and the height of the elastic auxiliary supporting point can be adjusted by changing the height of the spring 19 .

It can be seen from the above that the embodiments of the present invention have the following advantages:

1) For different blank workpieces, even if there is a deviation in the height of the support plane of the workpiece, there is no need to adjust the support 18 and the clamp body 20. The spring will automatically expand and contract to adapt to the height of the support plane while providing auxiliary support force, so when replacing the blank After the workpiece, the adjustment time of the auxiliary support point is greatly reduced.

2) After the spring adapts to the height of the support plane of the blank workpiece, the ejector rod 21 is locked by the locking screw 16 to prevent the vibration of the auxiliary support point caused by the change of the cutting force during the cutting process, which can better ensure the machining accuracy.

3) The auxiliary support point is in contact with the workpiece 11 through the roller 12. When clamping, the long workpiece can be directly pushed on the roller of the auxiliary support point. During the processing, the long workpiece is caused by cutting force or thermal expansion and contraction. When axially deformed, the roller can adapt to this deformation to avoid scratching the workpiece being processed.

4) The manual auxiliary support mechanism of the present invention is small in size, easy to install and use, low in cost and good in effect.

The above is only a preferred embodiment of the present invention, it should be pointed out that, for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications can also be made. It should be regarded as the protection scope of the present invention.

Claims (7)

1.Yi Zhong Manual auxiliary support mechanism, is characterized in that, comprising:

Bearing (18), is fixedly mounted on clamp body (20) upper, and described bearing (18) inside has the cavity of up/down perforation;

Guide pin bushing (15), is fixedly mounted in the described cavity of described bearing (18), and described guide pin bushing (15) has central through hole;

Push rod (21), has the body of rod and rod end, and the described body of rod is slidably arranged in described central through hole, and described rod end is positioned at the below of described guide pin bushing (15);

Spring (19), is positioned at described cavity, and one end contact is at described rod end, and other end contact is on described clamp body (20);

Support column (14), lower end is arranged in the mounting groove of the described body of rod, and upper end is for supporting workpiece (10);

Lock-screw (16), runs through described bearing (18), described guide pin bushing (15), described push rod (21), locks or unclamps described support column (14);

The nut (13) that regulates described support column (14) height, is socketed on described support column (14).

2. Manual auxiliary support according to claim 1 mechanism, is characterized in that, the described upper end of described support column (14) is provided with roller (12), by described roller (12) contact, supports described workpiece (11).

3. Manual auxiliary support according to claim 2 mechanism, is characterized in that, the described lower end of described support column (14) has the locking side (141) coordinating with described lock-screw (16).

4. Manual auxiliary support according to claim 1 mechanism, is characterized in that, described guide pin bushing (15) is fixedly mounted in described cavity by interference fit.

5. Manual auxiliary support according to claim 4 mechanism, is characterized in that, also comprises: the second lock-screw (17), runs through described bearing (18) and locks described guide pin bushing (15).

6. Manual auxiliary support according to claim 5 mechanism, is characterized in that, described guide pin bushing (15) has the locking side groove (151) matching with described the second lock-screw (17).

7. Manual auxiliary support according to claim 1 mechanism, is characterized in that, the described rod end of described push rod (21) has:

For being socketed in first boss (211) of the inner ring of described spring;

For being socketed second boss (212) of location, be positioned on described the first boss.