Water jet round bar sample clamp
By designing a water jet round bar sample clamp that includes guide pins, lead screws, and threaded adjustment components, the problems of inaccurate positioning and poor versatility of existing devices are solved. It achieves low-cost, convenient clamping and stable centering of round bar samples, with strong adaptability and suitability for high-pressure water flow environments.
Patent Information
- Application Number
- CN202422766479.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-13
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2034-11-13
AI Technical Summary
Existing waterjet cylindrical sample clamping devices suffer from problems such as inaccurate positioning, poor versatility, high cost, complex installation, and difficulty in maintaining performance under high-pressure water flow environments.
A water jet cylindrical bar sample clamping fixture was designed, comprising a first clamping seat, a second clamping seat, and a clamping block assembly. The clamping block is moved synchronously in opposite directions using a guide pin, a lead screw, and a threaded adjustment component. The fixture employs a ball screw mechanism and a V-block structure to accommodate cylindrical bar samples of different diameters, and the clamping is driven by the threaded adjustment component.
It achieves low-cost and convenient centering clamping, is highly adaptable, suitable for small equipment, expands the clamping range, and maintains stable performance in high-pressure water flow environments.
Smart Images
Figure CN223513025U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to water jet surface strengthening, more particularly to a water jet round bar sample clamp. BACKGROUND
[0002] Water jet surface strengthening technology is a method of using high-pressure water flow to impact the surface of a material to improve the surface state of the material and increase its fatigue life. When conducting water jet strengthening experiments, round bar samples are usually used as experimental materials, and the specific standards of round bar samples refer to GB / T 228.1-2021.
[0003] The clamping device for water jet round bar samples faces many technical challenges. The centering clamp may encounter positioning inaccuracy when clamping the round bar sample, affecting the accuracy of processing or testing. At the same time, the versatility of the fixed clamp is poor, making it difficult to adapt to round bar samples of different diameters, requiring frequent replacement or adjustment, which reduces production efficiency and the flexibility of the clamp. Known variable-diameter clamps (such as three-jaw chucks, etc.) are often high in cost, complex to install, and take up a lot of space, making them difficult to maintain. In addition, in special working environments, such as high-pressure and high-speed water flow conditions inside water jet strengthening equipment, known clamping devices are difficult to install and maintain performance under continuous impact. SUMMARY
[0004] To solve the above-mentioned problem of high cost of variable-diameter clamps in the prior art, the utility model provides a water jet round bar sample clamp.
[0005] The water jet round bar sample clamp according to the utility model comprises a first clamp seat, a second clamp seat, and a clamping block assembly. The clamping block assembly comprises a first clamping block, a second clamping block, a guide pin, a lead screw, and a threaded adjusting piece. The guide pin and the lead screw are independently installed between the first clamp seat and the second clamp seat. The first clamping block and the second clamping block are symmetrically and spaced apart. The first end of the first clamping block and the second clamping block is sleeved on the guide pin. The second end of the first clamping block and the second clamping block is connected to the threaded adjusting piece through the lead screw. The installation direction of the first clamping block and the second clamping block on the lead screw is opposite. The first clamping block and the second clamping block are driven by the threaded adjusting piece to move in opposite directions in a straight line to clamp the round bar sample.
[0006] In a preferred embodiment, the first clamping block and the second clamping block each comprise a clamping body, a connecting sleeve, and a ball nut. The connecting sleeve is integrally formed on the first side of the clamping body and freely moves on the guide pin. The ball nut is integrally formed on the second side of the clamping body and forms a ball screw mechanism with the lead screw.
[0007] In a preferred embodiment, the clamping body adopts the structure of a V-shaped block.
[0008] In a preferred embodiment, the first clamp seat has a first guide groove, and the second clamp seat has a second guide groove. The first guide groove and the second guide groove are aligned for the installation of the guide pin. The first clamp seat has a first lead screw groove, and the second clamp seat has a second lead screw groove. The first lead screw groove and the second lead screw groove are aligned for the installation of the lead screw.
[0009] In a preferred embodiment, a first protrusion, a second protrusion, and a third protrusion, spaced apart from each other, are respectively provided in the first guide groove and the second guide groove. The connecting sleeve of the first clamping block moves freely between the first protrusion and the second protrusion in the first guide groove and the second guide groove. The connecting sleeve of the second clamping block moves freely between the second protrusion and the third protrusion in the first guide groove and the second guide groove.
[0010] In a preferred embodiment, the outer surface of the guide pin has a polygonal profile, and the first protrusion, the second protrusion, and the third protrusion each have a corresponding polygonal concave profile.
[0011] In a preferred embodiment, a fourth protrusion, a fifth protrusion, and a sixth protrusion, spaced apart from each other, are respectively provided in the first screw groove and the second screw groove for supporting the screw. The ball nut of the first clamping block can move freely between the fourth protrusion and the fifth protrusion in the first screw groove and the second screw groove, and the ball nut of the second clamping block can move freely between the fifth protrusion and the sixth protrusion in the first screw groove and the second screw groove.
[0012] In a preferred embodiment, the first clamping seat is U-shaped and has a first through hole at its center, and the second clamping seat is U-shaped and has a second through hole at its center. The first through hole and the second through hole are aligned so that the first clamping block and the second clamping block can move within them to clamp the round bar sample.
[0013] In a preferred embodiment, the first clamp seat has a first threaded hole and the second clamp seat has a second threaded hole. The first threaded hole and the second threaded hole are aligned for fasteners to be inserted to fix the first clamp seat and the second clamp seat together.
[0014] In a preferred embodiment, the threaded adjustment component includes an integrally formed threaded component and a transmission gear. The first clamping seat has a third threaded hole communicating with the first lead screw groove. The threaded component is installed in the third threaded hole through external threads. The transmission gear meshes with the lead screw gear at the end of the lead screw to drive the rotation of the lead screw through the threaded adjustment component.
[0015] According to the present invention, the water jet round bar sample clamping fixture drives the first clamping block and the second clamping block to move synchronously in opposite directions in a linear motion through a threaded adjustment component to clamp the round bar sample. It can achieve centering clamping of the round bar sample, is low in cost, and is very convenient to install, disassemble, maintain and replace. It has a small overall size and occupies a small area, which can better adapt to relatively small water jet enhancement equipment and can be installed as an auxiliary fixture in the original fixture to expand the clamping range of the original fixture. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of a water jet round bar sample holder according to a preferred embodiment of the present invention.
[0017] Figure 2 yes Figure 1 A schematic diagram of the structure of the first clamping seat.
[0018] Figure 3 yes Figure 1 A schematic diagram of the structure of the second clamp seat.
[0019] Figure 4 yes Figure 1 A schematic diagram of the clamping block assembly.
[0020] Figure 5 yes Figure 4 A schematic diagram of the structure of the first clamping block.
[0021] Figure 6 Show Figure 4 The clamping block assembly in Figure 3 Mounting on the second clamp seat.
[0022] Figure 7 yes Figure 4 A schematic diagram of the structure of the threaded adjustment component.
[0023] Figure 8 This is a screenshot of stress data from a simulation experiment of a round bar sample using a water jet round bar sample fixture according to a preferred embodiment of the present invention.
[0024] Figure 9 This is a screenshot of strain data from a simulation experiment of a round bar sample using a water jet round bar sample holder according to a preferred embodiment of the present invention.
[0025] Figure 10 This is a screenshot of displacement data from a simulation experiment of a round bar sample using a water jet round bar sample holder according to a preferred embodiment of the present invention. Detailed Implementation
[0026] The preferred embodiments of this utility model are given below with reference to the accompanying drawings and described in detail.
[0027] like Figure 1 As shown, a preferred embodiment of the waterjet round bar sample holder according to this utility model includes a first clamping seat 1, a second clamping seat 2, and a clamping block assembly 3, wherein the clamping block assembly 3 is installed between the first clamping seat 1 and the second clamping seat 2 to clamp the round bar sample. In use, the clamping block assembly 3 is first installed onto the second clamping seat 2, and then the first clamping seat 1 is closed. The first clamping seat 1 and the second clamping seat 2 can be tightened together using shorter bolts and placed in a clamp such as a three-jaw chuck as an auxiliary clamp; alternatively, longer bolts can be used to directly fix the clamp to the base for use.
[0028] like Figure 2 and Figure 3 As shown, the first clamping seat 1 and the second clamping seat 2 are respectively in the shape of a U-shape, and their centers have a first through hole 11 and a second through hole 21 respectively. The first through hole 11 and the second through hole 21 are aligned so that the clamping block assembly 3 can move within them to clamp the round bar sample.
[0029] like Figure 2 and Figure 3 As shown, the first clamp seat 1 and the second clamp seat 2 have a first threaded hole 12 and a second threaded hole 22 respectively on the upper and lower sides of the through hole. The first threaded hole 12 and the second threaded hole 22 are aligned so that bolts can be inserted to fix the first clamp seat 1 and the second clamp seat 2 together.
[0030] like Figure 2 and Figure 3 As shown, the first clamping seat 1 and the second clamping seat 2 have a first guide groove 13 and a second guide groove 23 respectively on the left side of the through hole, and a first lead screw groove 14 and a second lead screw groove 24 respectively on the right side of the through hole. The first guide groove 13 and the second guide groove 23 are aligned and the first lead screw groove 14 and the second lead screw groove 24 are aligned for mounting the clamping block assembly 3. In addition, the first clamping seat 1 also has a third threaded hole 15, which communicates with the lead screw grooves 14 and 24 for mounting the clamping block assembly 3.
[0031] like Figure 4 As shown, the clamping block assembly 3 includes a first clamping block 31, a second clamping block 32, a guide pin 33, a lead screw 34, and a threaded adjustment member 35. The first ends of the first clamping block 31 and the second clamping block 32, which are spaced apart from each other, are sleeved on the guide pin 33. The second ends of the first clamping block 31 and the second clamping block 32 are connected to the threaded adjustment member 35 through the lead screw 34, thereby driving the first clamping block 31 and the second clamping block 32 to move closer to each other to clamp the round bar sample.
[0032] The first clamping block 31 and the second clamping block 32 have the same structure; the following description will only use the first clamping block 31 as an example.Figure 5 As shown, the first clamping block 31 includes a clamping body 311, a connecting sleeve 312, and a ball nut 313. The connecting sleeve 312 is integrally formed on the left side of the clamping body 311 and is sleeved on the guide pin 33, allowing free movement. The ball nut 313 is integrally formed on the right side of the clamping body 311 and forms a ball screw mechanism with the lead screw 34. Specifically, the internal thread of the ball nut 313 engages with the external thread of the lead screw 34, and the balls located between the helical groove of the lead screw 34 and the corresponding path of the ball nut 313 ensure smooth movement and distribute the load, resulting in high precision and a relatively simple structure.
[0033] In this invention, the clamping bodies of clamping blocks 31 and 32 adopt a V-shaped block structure, which can better adapt to round bar samples of different diameters and ensure that the center position of the round bar sample remains unchanged, thereby facilitating subsequent processing and experimentation.
[0034] Combination Figures 2-6 The guide pin 33 is installed in the guide grooves 13 and 23. Specifically, the guide grooves 13 and 23 are provided with a first protrusion 3a, a second protrusion 3b, and a third protrusion 3c spaced apart from each other to support the guide pin 33. In this embodiment, the outer surface of the guide pin 33 has a polygonal outline, and the protrusions 3a, 3b, and 3c have corresponding polygonal concave outlines, thereby supporting and installing the guide pin 33 through the protrusions 3a, 3b, and 3c. The connecting sleeve 312 of the first clamping block 31 moves freely between the first protrusion 3a and the second protrusion 3b within the guide grooves 13 and 23, and the connecting sleeve of the second clamping block 32 moves freely between the second protrusion 3b and the third protrusion 3c within the guide grooves 13 and 23.
[0035] Combination Figures 2-6 The lead screw 34 is installed in the lead screw grooves 14 and 24. Specifically, the lead screw grooves 14 and 24 are provided with a fourth protrusion 4a, a fifth protrusion 4b, and a sixth protrusion 4c spaced apart from each other to support the lead screw 34. The ball nut 313 of the first clamping block 31 moves freely within the lead screw grooves 14 and 24 between the fourth protrusion 4a and the fifth protrusion 4b, and the ball nut of the second clamping block 32 moves freely within the lead screw grooves 14 and 24 between the fifth protrusion 4b and the sixth protrusion 4c.
[0036] In this invention, the guide grooves 13, 23 and the screw grooves 14, 24 are relatively narrow and located laterally, which can better prevent the abnormal operation of the water jet round bar sample holder caused by the high pressure water flow and particulate matter during water jet enhancement.
[0037] like Figure 7 As shown, the threaded adjustment component 35 includes an integrally formed threaded component 351 and a transmission gear 352, wherein the threaded component 351 is mounted on the third threaded hole 15 of the first clamping seat 1 via an external thread 5a (see...). Figure 2Inside, the transmission gear 352 and the lead screw gear 341 at the end of the lead screw 34 (see...) Figure 4 The engagement drives the rotation of the lead screw 34 via the threaded adjustment member 35. In this embodiment, the threaded member 351 has an exposed internal hexagon 5b, through which external force drives the threaded adjustment member 35.
[0038] In this invention, the first clamping block 31 and the second clamping block 32 are installed in opposite directions on the lead screw 34. The threaded component 351 drives the lead screw 34 to rotate through the transmission gear 352, thereby causing the first clamping block 31 and the second clamping block 32 to move synchronously in opposite directions to clamp the round bar sample through the V-shaped body. Since the clamping force is not too large for the round bar sample reinforced by water jet, the external thread 5a can be used to ensure a tight clamping.
[0039] In this invention, the first clamping block 31 and the second clamping block 32 are symmetrically structured and achieve linear motion under the drive of the lead screw 34. The guide pin 33, in conjunction with the guide pin 33, prevents deformation of the clamping blocks 31 and 32 under stress. The guide pin 33 requires sufficient bending strength; the bending strength of ordinary 304 stainless steel or similar materials is sufficient for the application. Simulation experiments were conducted on a round bar sample with a diameter of approximately 20 mm, and the stress data are as follows: Figure 8 As shown, its strain data is as follows Figure 9 As shown, its displacement data is as follows Figure 10 As shown. The results show that the stress of clamping blocks 31 and 32 meets the usage requirements, the deformation after being subjected to force is small, and the displacement difference between the two sides is also within the allowable range.
[0040] The water jet round bar sample clamp of this utility model is a variable diameter centering clamp designed for small diameter round bar samples in water jet enhancement. It is particularly suitable for round bar samples with a diameter of less than or equal to 26 mm. The upper and lower limits of the size of the round bar sample can be modified by changing the shape of the clamping blocks 31 and 32 according to the usage requirements.
[0041] In summary, the waterjet round bar sample holder of this invention enables centering and clamping of round bar samples. Installation, disassembly, maintenance, and replacement are all very convenient. Its small overall size and minimal footprint make it well-suited for confined waterjet enhancement equipment and it can be used as an auxiliary fixture in existing fixtures to expand their clamping range. Furthermore, the waterjet round bar sample holder of this invention allows for manual adjustment of the clamping range via a ball screw structure, making it highly adaptable.
[0042] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various variations can be made to the above embodiments of this utility model. That is, all simple and equivalent changes and modifications made based on the claims and description of this utility model application fall within the protection scope of the claims of this utility model patent. Any aspects of this utility model not described in detail are conventional technical content.
Claims
1. A water jet cylindrical bar sample holder, characterized in that, The waterjet round bar sample holder includes a first clamping seat, a second clamping seat, and a clamping block assembly. The clamping block assembly includes a first clamping block, a second clamping block, a guide pin, a lead screw, and a threaded adjustment component. The guide pin and the lead screw are independently installed between the first clamping seat and the second clamping seat, respectively. The first clamping block and the second clamping block are symmetrically arranged and spaced apart from each other. The first end of the first clamping block and the second clamping block are sleeved on the guide pin. The second end of the first clamping block and the second clamping block are connected to the threaded adjustment component through the lead screw. The first clamping block and the second clamping block are installed in opposite directions on the lead screw. The threaded adjustment component drives the first clamping block and the second clamping block to move synchronously in opposite directions in a linear motion to clamp the round bar sample.
2. The water jet round bar sample holder according to claim 1, characterized in that, The first clamping block and the second clamping block each include a clamping body, a connecting sleeve, and a ball nut. The connecting sleeve is integrally formed on the first side of the clamping body and is sleeved on the guide pin for free movement. The ball nut is integrally formed on the second side of the clamping body and forms a ball screw mechanism with the lead screw.
3. The water jet round bar sample holder according to claim 2, characterized in that, The clamping body adopts a V-shaped block structure.
4. The water jet round bar sample holder according to claim 2, characterized in that, The first clamp seat has a first guide groove, and the second clamp seat has a second guide groove. The first guide groove and the second guide groove are aligned for the installation of the guide pin. The first clamp seat has a first lead screw groove, and the second clamp seat has a second lead screw groove. The first lead screw groove and the second lead screw groove are aligned for the installation of the lead screw.
5. The water jet round bar sample holder according to claim 4, characterized in that, The first guide groove and the second guide groove are respectively provided with a first protrusion, a second protrusion and a third protrusion that are spaced apart from each other to support the guide pin. The connecting sleeve of the first clamping block can move freely between the first protrusion and the second protrusion in the first guide groove and the second guide groove. The connecting sleeve of the second clamping block can move freely between the second protrusion and the third protrusion in the first guide groove and the second guide groove.
6. The water jet round bar sample holder according to claim 5, characterized in that, The outer surface of the guide pin has a polygonal profile, and the first protrusion, the second protrusion and the third protrusion each have a corresponding polygonal concave profile.
7. The water jet round bar sample holder according to claim 4, characterized in that, The first and second lead screw grooves are respectively provided with a fourth protrusion, a fifth protrusion, and a sixth protrusion that are spaced apart from each other to support the lead screw. The ball nut of the first clamping block can move freely between the fourth and fifth protrusions in the first and second lead screw grooves. The ball nut of the second clamping block can move freely between the fifth and sixth protrusions in the first and second lead screw grooves.
8. The water jet round bar sample holder according to claim 1, characterized in that, The first clamping seat is U-shaped and has a first through hole in its center. The second clamping seat is U-shaped and has a second through hole in its center. The first through hole and the second through hole are aligned so that the first clamping block and the second clamping block can move within them to clamp the round bar sample.
9. The water jet round bar sample holder according to claim 8, characterized in that, The first clamp seat has a first threaded hole, and the second clamp seat has a second threaded hole. The first threaded hole and the second threaded hole are aligned so that fasteners can be inserted to fix the first clamp seat and the second clamp seat together.
10. The waterjet round bar sample holder according to claim 1, characterized in that, The threaded adjustment component includes an integrally formed threaded component and a transmission gear. The first clamping seat has a third threaded hole communicating with the first lead screw groove. The threaded component is installed in the third threaded hole through external threads. The transmission gear meshes with the lead screw gear at the end of the lead screw to drive the rotation of the lead screw through the threaded adjustment component.