CN220074131U - Part inner hole bottom surface grinder - Google Patents
Part inner hole bottom surface grinder Download PDFInfo
- Publication number
- CN220074131U CN220074131U CN202321292824.1U CN202321292824U CN220074131U CN 220074131 U CN220074131 U CN 220074131U CN 202321292824 U CN202321292824 U CN 202321292824U CN 220074131 U CN220074131 U CN 220074131U
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- China
- Prior art keywords
- rod
- inner hole
- grinding block
- transmission rod
- ground
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- 230000005540 biological transmission Effects 0.000 claims abstract description 57
- 229910000831 Steel Inorganic materials 0.000 claims description 19
- 239000010959 steel Substances 0.000 claims description 19
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000003754 machining Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
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- Grinding Of Cylindrical And Plane Surfaces (AREA)
Abstract
The utility model relates to a grinder for the bottom surface of an inner hole of a part, which is mainly used for grinding the bottom plane or the bottom inner conical surface of the inner hole of various parts. This part hole bottom surface grinder includes: the clamping rod is used for being connected with the machine tool spindle and driven to rotate by the machine tool spindle; a grinding block rotatably assembled at the bottom of the inner hole of the part to be ground; the screw plug is partially assembled in the inner hole of the part to be grinded and is fixedly connected with the part to be grinded; the transmission rod rotates together with the clamping rod, and part of the transmission rod penetrates through the inner hole of the screw plug and then stretches into the inner hole of the part to be ground; a force transmission mechanism for transmitting the rotational force of the transmission rod to the grinding block; when the clamping rod is driven to rotate by the machine tool spindle, the transmission rod is driven to rotate together, and then the transmission rod drives the grinding block to rotate at the bottom of the inner hole of the part to be ground through the force transmission mechanism so as to grind the bottom surface of the inner hole of the part to be ground.
Description
Technical Field
The utility model relates to the field of precision machining of a plane or a conical surface at the bottom of an inner hole of a part, in particular to a grinder for the bottom surface of the inner hole of the part.
Background
The position accuracy and shape accuracy of the ground surface of the conventional inner hole bottom grinder are difficult to ensure when the inner hole is ground, particularly the bottom surface of a deep hole. In order to ensure the precision, the grinding fixture is designed by taking the machined part into consideration to adopt a floating structure so as to ensure that the original position precision of the ground surface is not damaged.
Disclosure of Invention
The utility model belongs to the field of precision machining of a plane or a conical surface at the bottom of an inner hole of a part, in particular to a grinder for the bottom of the inner hole of the part, which belongs to the innovative design of precision grinding, can obtain better roughness and flatness after grinding the plane at the bottom of the inner hole, and simultaneously better ensures the perpendicularity with a reference threaded hole; the method has the advantages that after the inner conical surface at the bottom of the inner hole is ground, better roughness and roundness are obtained, and meanwhile, the runout of the inner conical surface with the reference threaded hole is better guaranteed. The floating clamp has the advantages of no need of designing special part floating clamps, convenience in use, high efficiency, convenience in adjustment, high machining precision and the like.
The technical scheme of the utility model is as follows:
the utility model provides a part inner hole bottom surface grinder, which comprises: the clamping rod is used for being connected with the machine tool spindle and driven to rotate by the machine tool spindle;
a grinding block rotatably assembled at the bottom of the inner hole of the part to be ground;
the screw plug is partially assembled in the inner hole of the part to be grinded and is fixedly connected with the part to be grinded;
the transmission rod rotates together with the clamping rod, and part of the transmission rod penetrates through the inner hole of the screw plug and then stretches into the inner hole of the part to be ground;
a force transmission mechanism for transmitting the rotational force of the transmission rod to the grinding block;
when the clamping rod is driven to rotate by the machine tool spindle, the transmission rod is driven to rotate together, and then the transmission rod drives the grinding block to rotate at the bottom of the inner hole of the part to be ground through the force transmission mechanism so as to grind the bottom surface of the inner hole of the part to be ground.
Preferably, the clamping rod is connected to the transmission rod through a deflector rod and a screw rod;
one end of the deflector rod is fixedly assembled into the clamping rod;
the deflector rod and the transmission rod are arranged in parallel;
the screw rod is vertically assembled into the deflector rod and the transmission rod, and is fixedly connected with the transmission rod;
when the clamping rod is driven to rotate by the main shaft of the machine tool, the shifting rod is driven to rotate together, the shifting rod drives the screw rod to rotate, and the screw rod drives the transmission rod to rotate.
Preferably, a groove or a through hole is formed on a side of the grinding block facing the transmission rod, a mounting hole is formed on a side of the transmission rod facing the grinding block, and the force transmission mechanism includes: a spring and a steel ball;
the part of the steel ball is assembled into a groove or a through hole formed in the grinding block, and the steel ball and the groove or the through hole of the grinding block form conical surface fit;
one end of the spring is arranged in the mounting hole, and the other end of the spring abuts against the upper part of the steel ball.
Preferably, the screw plug is in screw connection with the part to be ground.
Preferably, the transmission rod part is sleeved on part of the periphery of the grinding block.
Preferably, the deflector rod is in threaded connection with the clamping rod, and the screw rod is in threaded connection with the transmission rod.
Preferably, the drive rod and the screw plug are in clearance fit.
Preferably, the transmission rod and the grinding block are in clearance fit.
Preferably, when a groove is formed on one side of the grinding block facing the transmission rod, the bottom surface of the inner hole of the part to be ground is a conical surface, and the outer wall of the grinding block and the bottom surface of the inner hole of the part to be ground form conical surface matching;
when the grinding block is provided with a through hole towards one side of the transmission rod, the bottom surface of the inner hole of the part to be ground is a plane, and the outer wall of the grinding block is in plane fit with the bottom surface of the inner hole of the part to be ground.
The beneficial effects of the utility model are as follows:
the part inner hole bottom surface grinder related to the scheme does not need to adopt a special part floating structure when grinding the inner hole bottom surface of the part. The grinding block provides a downwardly constant grinding pressure by spring compression, which is always oriented perpendicularly to the reference screw hole (reference screw hole means the screw hole of the part that cooperates with the screw plug 5 because the part 5 and the part are screwed together, which can be seen almost as a whole when subjected to a downward force). So as to ensure the position precision of the ground surface, and obtain better roughness and flatness after grinding the bottom plane of the inner hole; the grinder for the bottom surface of the inner hole of the part is higher in grinding efficiency because the grinding block is driven to rotate and grind by rotating a main shaft of a machine tool (such as a vertical drilling machine, a bench drill and the like) to provide rotating force. Specifically:
1. when the part inner hole bottom surface grinder works, the compression force of the spring is transmitted to the steel ball, the spherical structure of the steel ball enables the force to be downward all the time, the steel ball is in contact with the conical surface of the grinding block, the conical surface of the grinding block is perpendicular to the bottom plane of the grinding block, and when the force received by the conical surface is transmitted to the grinding block, the force is ensured to be downward vertically, namely the flat (conical) bottom surface of the grinding block is ensured to be perpendicular to the reference threaded hole. The working principle is beneficial to ensuring the position precision (perpendicularity or runout) of the plane or conical surface of the bottom of the hole and the reference hole, and a conventional part floating structure is not required to be designed.
2. The grinder for the bottom surface of the inner hole of the part is provided with a grinding block part, and the grinder has two structural modes, one is a plane structure for grinding the bottom plane of the hole, and the other is a conical surface structure for grinding the bottom conical surface of the middle hole. The two grinding block structure forms can realize higher grinding precision, and can be suitable for grinding parts with two different structures.
3. When the depth of the inner hole of the part is increased, the transmission rod and the screw plug with different lengths can be designed to adapt to grinding of the plane or the conical surface of the bottom of the inner hole with different depths.
Drawings
FIG. 1 is a schematic view of a part inner hole bottom grinder with a plane inner hole bottom;
FIG. 2 is a schematic diagram of a part inner hole bottom grinder with a conical surface at the inner hole bottom;
the figures are labeled as follows: 1: clamping bar, 2: deflector rod, 3: screw rod, 4: transmission rod, 5: screw plug, 6: spring, 7: steel ball, 8: grinding the blocks.
Detailed Description
Referring to fig. 1 and 2, in this embodiment, there is provided a part hole bottom grinder, including: the device comprises a clamping rod 1, a deflector rod 2, a screw rod 3, a transmission rod 4, a screw plug 5, a spring 6, a steel ball 7 and a grinding block 8.
The clamping rod 1, the deflector rod 2 and the screw rod 3 mainly provide rotating power, the clamping rod 1 is clamped on a main shaft of a machine tool (such as a vertical drilling machine, a bench drill and the like), the deflector rod 2 is clamped on the clamping rod 1 through threads, the deflector rod 2 is rotated in a non-fixed mode to stir the screw rod 3, and the screw rod 3 penetrates through the transmission rod 4 in a threaded connection mode to simulate manual rotation of a person.
The external thread of the screw plug 5 is matched with the part, the screw plug 5 can rotate in the part to be grinded to move up and down, so that the compression amount of the spring 6 is changed, and the pressure transmitted to the grinding block 8 is increased or reduced, thereby adjusting the grinding pressure of the grinding block 8.
The inner hole of the screw plug 5 and the outer circle of the transmission rod 4 form smaller clearance fit, and the end surface of the transmission rod 4 is in clearance fit with the grinding block 8 through two bosses (the transmission rod 4 is partially sleeved on the periphery of the grinding block 8).
The spring 6 and the steel ball 7 form a force transmission mechanism, the bottom plane of the mounting hole of the transmission rod 4 is attached to one end of the spring 6, the other end of the spring 6 is attached to the steel ball 7, the steel ball 7 is attached to the inner conical surface of the grinding block 8, and conical surface matching of the steel ball 7 and the grinding block 8 is achieved.
In this embodiment, the machine spindle does not transmit pressure downwards, only transmits rotational force to the grinding block 8, simulating a fully floating device for manual grinding. Specifically, when the clamping rod 1 is driven to rotate by the main shaft of the machine tool, the driving rod 2 and the screw 3 drive the driving rod 4 to rotate together, the plane at the bottom of the installation hole of the driving rod 4 transmits force to the spring 6, so that the spring 6 is compressed, the compression force of the spring 6 pushes the steel ball 7 to bear downward force, and finally the steel ball 7 transmits constant downward force to the grinding block 8, so that the driving rod 4 drives the grinding block 8 to rotate, and the grinding block 8 grinds the bottom plane of each inner hole or the inner conical surface at the bottom of the inner hole.
In this embodiment, the grinding block 8 has two structural forms, one is a planar structure of the bottom plane of the grinding hole shown in fig. 1, when a through hole is formed on one side of the grinding block 8 facing the transmission rod 4, the bottom plane of the inner hole of the part to be ground is a plane, and the outer wall of the grinding block 8 and the bottom plane of the inner hole of the part to be ground form a plane fit; the other is the conical surface structure of the conical surface of the bottom of the grinding middle hole shown in fig. 2, when a groove is formed on one side of the grinding block 8 facing the transmission rod 4, the bottom surface of the inner hole of the part to be ground is a conical surface, and the outer wall of the grinding block 8 and the bottom surface of the inner hole of the part to be ground form conical surface matching. Both grinding block structures can realize higher grinding precision.
In this embodiment, when the depth of the inner hole of the part to be grinded is increased, the transmission rod 4 and the screw plug 5 with different lengths can be designed to adapt to the grinding of the plane or the conical surface of the bottom of the inner hole with different depths.
Claims (9)
1. A part bore bottom grinder, comprising: the clamping rod is used for being connected with the machine tool spindle and driven to rotate by the machine tool spindle;
a grinding block rotatably assembled at the bottom of the inner hole of the part to be ground;
the screw plug is partially assembled in the inner hole of the part to be grinded and is fixedly connected with the part to be grinded;
the transmission rod rotates together with the clamping rod, and part of the transmission rod penetrates through the inner hole of the screw plug and then stretches into the inner hole of the part to be ground;
a force transmission mechanism for transmitting the rotational force of the transmission rod to the grinding block;
when the clamping rod is driven to rotate by the machine tool spindle, the transmission rod is driven to rotate together, and then the transmission rod drives the grinding block to rotate at the bottom of the inner hole of the part to be ground through the force transmission mechanism so as to grind the bottom surface of the inner hole of the part to be ground.
2. The part bore floor grinder of claim 1, wherein the clamping bar is connected to the drive rod by a deflector rod and a screw;
one end of the deflector rod is fixedly assembled into the clamping rod;
the deflector rod and the transmission rod are arranged in parallel;
the screw rod is vertically assembled into the deflector rod and the transmission rod, and is fixedly connected with the transmission rod;
when the clamping rod is driven to rotate by the main shaft of the machine tool, the shifting rod is driven to rotate together, the shifting rod drives the screw rod to rotate, and the screw rod drives the transmission rod to rotate.
3. The part bore bottom surface grinder of claim 1, wherein a groove or a through hole is formed in a side of the grinding block facing the transmission rod, a mounting hole is formed in a side of the transmission rod facing the grinding block, and the force transmission mechanism comprises: a spring and a steel ball;
the part of the steel ball is assembled into a groove or a through hole formed in the grinding block, and the steel ball and the groove or the through hole of the grinding block form conical surface fit;
one end of the spring is arranged in the mounting hole, and the other end of the spring abuts against the upper part of the steel ball.
4. The part bore bottom grinder of claim 1, wherein the plug screw is threaded with the part to be ground.
5. The part hole bottom grinder of claim 1, wherein the transmission rod part is sleeved on part of the periphery of the grinding block.
6. The part hole bottom grinder of claim 2, wherein the deflector rod is screwed with the clamping rod, and the screw rod is screwed with the transmission rod.
7. The component bore floor grinder of claim 1, wherein the drive rod and the plug are clearance fit.
8. The part bore bottom grinder of claim 5, wherein the drive rod and the grinding block are clearance fit.
9. The part inner hole bottom surface grinder according to claim 3, wherein when a groove is formed on one side of the grinding block facing the transmission rod, the inner hole bottom surface of the part to be ground is a conical surface, and the outer wall of the grinding block and the inner hole bottom surface of the part to be ground form conical surface matching;
when the grinding block is provided with a through hole towards one side of the transmission rod, the bottom surface of the inner hole of the part to be ground is a plane, and the outer wall of the grinding block is in plane fit with the bottom surface of the inner hole of the part to be ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321292824.1U CN220074131U (en) | 2023-05-25 | 2023-05-25 | Part inner hole bottom surface grinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321292824.1U CN220074131U (en) | 2023-05-25 | 2023-05-25 | Part inner hole bottom surface grinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220074131U true CN220074131U (en) | 2023-11-24 |
Family
ID=88815442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321292824.1U Active CN220074131U (en) | 2023-05-25 | 2023-05-25 | Part inner hole bottom surface grinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220074131U (en) |
-
2023
- 2023-05-25 CN CN202321292824.1U patent/CN220074131U/en active Active
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