A water jet cutting fixture with a connecting handle

Abstract

The present invention discloses a connecting handle water jet cutting fixture, including a locking screw, a base, a tension rod, a protective bushing, a positioning base plate, a clamping bolt, a positioning pin, a clamping block and a cover plate. The tension rod has one end with a threaded hole at the bottom, which is inserted into the center hole of the base. The locking screw is inserted into the base and the tension rod. The cover plate is inserted into the top thread of the tension rod and tightened to fix the protective bushing. The positioning pin is fixed on the positioning base plate. The clamping bolt is inserted into the clamping block, and the clamping bolt is screwed into the positioning base plate. The beneficial effect is that: using this fixture can ensure that the repeated positioning error of each cutting product after clamping does not exceed 0.05mm, thereby improving the manufacturing accuracy; at the same time, the clamping operation process is simplified, and the clamping and alignment time is reduced by more than 80%; it can also provide necessary protection for the parts of the product that do not need to be cut, reduce accidental cutting injuries, and improve the yield rate. It has good economic value.

Description

Technical Field

[0001] The invention belongs to the field of nuclear fuel parts manufacturing, and specifically relates to a connecting handle water jet cutting fixture Background Art

[0002] The connecting handle is located at the top of the nuclear fuel control rod assembly of the pressurized water reactor. It is one of the key core products for controlling the nuclear fission reaction power of the pressurized water reactor and starting and stopping the reactor. In order to improve the manufacturing technology level and production efficiency of nuclear power products, it is necessary to study the water jet cutting process technology of the connecting handle. However, the cutting quality of the product is unstable during the processing, and the yield rate is not high.

[0003] In the prior art, due to the lack of cutting positioning fixtures, the workpieces can only be clamped randomly, and then the tooling must be adjusted piece by piece according to the different positions of each product, which is time-consuming and labor-intensive. In addition, due to the positioning errors in manual clamping, the size of each product after cutting is different, resulting in unstable size and quality of the cut products. In addition, due to the use of high-pressure water jet technology, the residual power of the water column in cutting the workpiece will still cut the unneeded part of the workpiece, causing surface defects on the product and causing it to be scrapped. In the end, only the finished products with better quality can be selected as qualified products, wasting a lot of time and money. Summary of the invention

[0004] The purpose of the present invention is to provide a connecting handle water jet cutting fixture to address the defects of the prior art. The fixture can accurately position the cutting workpiece, effectively simplify the clamping difficulty during cutting of the connecting handle, reduce repeated positioning errors and tool alignment difficulty, and improve cutting quality; at the same time, it can provide necessary protection for the parts of the product that do not need to be cut, reduce accidental injuries during cutting, and improve the yield of finished products.

[0005] The technical solution of the present invention is as follows: a connecting handle water jet cutting fixture, comprising a locking screw, a base, a tension rod, a protective bushing, a positioning base plate, a clamping bolt, a positioning pin, a clamping block and a cover plate,

[0006] The bottom of the tension rod has one end with a threaded hole, which is inserted into the center hole of the base, the locking screw is inserted into the base and the tension rod, the cover plate is inserted into the top thread of the tension rod and tightened to fix the protective bushing, the positioning pin is fixed on the positioning base plate, the clamping bolt is inserted into the clamping block, and the clamping bolt is screwed into the positioning base plate;

[0007] The cover plate is a circular stepped column structure, and the cylindrical surface with a smaller diameter extends into the connecting handle cutting piece to protect the end surface; the cover plate has a threaded through hole in the middle for connecting the tension rod and fixing the clamp protection bushing;

[0008] The positioning base plate is a hexagonal plate with 6 threaded through holes evenly distributed on the 6 sides, which are used to connect and fix the positioning base plate to the cutting machine tool; there are 2 threaded through holes distributed on 2 sides, which are used to fix the connecting handle cutting piece; there is a circular sink in the middle of the positioning base plate, which is used to position and fix the connecting handle cutting piece; there are positioning holes on the two branches in the middle of the positioning base plate, which are used to install positioning pins, and cooperate with the positioning pins to achieve precise positioning of the connecting handle cutting piece.

[0009] The clamping block is a special-shaped structural part with a threaded hole or a through hole in the center. A clamping bolt is inserted into the hole to clamp and fix the connecting handle cutting part.

[0010] The clamping bolt is a bolt-like structure, which penetrates into the clamping block and the positioning base plate and is used to clamp and fix the connecting handle cutting piece.

[0011] The positioning pin is a cylindrical stepped pin structure, which penetrates into the positioning base plate and is used to locate the relative position of the connecting handle cutting piece.

[0012] The protective bushing is a cylindrical tube-like structure made of ceramic or metal, and is sleeved on the non-cutting part of the connecting handle cutting piece to protect the connecting handle and prevent damage to the non-cutting part.

[0013] The tension rod is a stud-like structure, which is used to connect the base and the cover plate and cooperate with the fixed protective bushing.

[0014] The base is a cylindrical stepped column structure, and the cylindrical surface with a smaller diameter extends into the connecting handle cutting piece to protect the end surface; the base has a countersunk hole in the middle for connecting and fixing the tension rod in conjunction with a locking screw.

[0015] The locking screw is a screw-like structure and is used to cooperate with the base to connect and fix the tension rod.

[0016] The beneficial effects of the present invention are: using the clamp of the present invention can ensure that the repeated positioning error of each cut product after clamping does not exceed 0.05mm, thereby improving the manufacturing accuracy; at the same time, the clamping operation process is simplified, and the clamping and alignment time is reduced by more than 80%; and necessary protection can be provided for the parts of the product that do not need to be cut, thereby reducing accidental cutting injuries and improving the yield rate. It has good economic value. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of a connecting handle water jet cutting fixture part provided by the present invention;

[0018] Figure 2 A schematic diagram of the structure of a connecting handle water jet cutting fixture provided by the present invention;

[0019] Figure 3 Bit Figure 2 AA direction schematic diagram;

[0020] Figure 4 This is a schematic diagram of assembling a connecting handle water jet cutting fixture provided by the present invention.

[0021] In the figure: 1 cover plate, 2 clamping block, 3 positioning pin, 4 clamping bolt, 5 positioning base plate, 6 protective bushing, 7 tension rod, 8 base, 9 locking screw, 10 connecting handle. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] like Figure 1-4 As shown, a connecting handle water jet cutting fixture includes a locking screw 9, a base 8, a tension rod 7, a protective bushing 6, a positioning base plate 5, a clamping bolt 4, a positioning pin 3, a clamping block 2 and a cover plate 1.

[0024] Among them, one end of the tension rod 7 with a threaded hole at the bottom is inserted into the center hole of the base 8 (the end with a larger diameter of the base is downward); the locking screw 9 is inserted into the base 8 and the tension rod 7 from bottom to top (from the side with a larger diameter of the base), and the locking screw 9 is tightened to ensure that the base 8 and the tension rod 7 are fixed and not loose; the protective bushing 6 is sleeved on the handle body of the connecting handle, the tension rod 7 is inserted from the middle of the handle body of the connecting handle, and the cover plate 1 is inserted into the top thread of the tension rod and tightened to fix the protective bushing 6. The above parts are installed on the positioning base plate 5, and the positioning pin 3 is tightened and fixed on the positioning base plate 5 to connect the positioning base plate 5 and the connecting handle cutting piece; the clamping bolt 4 is inserted into the clamping block 2, and then the clamping bolt 4 is screwed into the two corresponding threads of the positioning base plate; the number of threads of the clamping bolt 4 is adjusted to make the clamping block rigidly fix the connecting handle cutting workpiece. There are 6 threaded holes evenly distributed on the 6 sides of the positioning base plate (1 on each side), and screws are used to install and fix it on the cutting machine through thread matching.

[0025] The cover plate 1 is a circular stepped column structure, and the cylindrical surface with a smaller diameter extends into the connecting handle cutting piece to protect the end surface; the cover plate has a threaded through hole in the middle for connecting the tension rod and fixing the clamp protection bushing.

[0026] The clamping block 2 is a special-shaped structural part with a threaded hole or a through hole in the center. A clamping bolt is inserted into the hole to clamp and fix the connecting handle cutting part.

[0027] The clamping bolt 4 is a bolt-like structure, which penetrates into the clamping block and the positioning base plate to clamp and fix the connecting handle cutting piece.

[0028] The positioning pin 3 is a cylindrical stepped pin structure, which penetrates into the positioning base plate and is used to locate the relative position of the connecting handle cutting piece.

[0029] The positioning base plate 5 is a hexagonal plate with 6 threaded through holes evenly distributed on the 6 sides, which are used to connect and fix the positioning base plate to the cutting machine tool; there are 2 threaded through holes distributed on 2 sides, which are used to fix the connecting handle cutting piece; there is a circular sink in the middle of the positioning base plate, which is used to position and fix the connecting handle cutting piece; there are positioning holes on the two branches in the middle of the positioning base plate, which are used to install positioning pins, and cooperate with the positioning pins to achieve precise positioning of the connecting handle cutting piece.

[0030] The protective bushing 6 is a cylindrical structure made of ceramic or metal, and is sleeved on the non-cutting part of the connecting handle cutting piece to protect the connecting handle and prevent damage to the non-cutting part.

[0031] The tension rod 7 is a stud-like structure, used to connect the base and the cover plate, and cooperate to fix the protective bushing.

[0032] The base 8 is a cylindrical stepped column structure, and the cylindrical surface with a smaller diameter extends into the connecting handle cutting piece to protect the end surface; there is a countersunk hole in the middle of the base for connecting and fixing the tension rod with a locking screw.

[0033] The locking screw 9 is a screw-like structure, and is used to cooperate with the base to connect and fix the tension rod.

[0034] The use of the present invention is as follows:

[0035] First, tighten the positioning pin on the positioning base plate, and fix the positioning base plate on the cutting machine with screws; then fix the tension rod on the base with locking screws; then Figure 4 As shown, put the protective bushing on the connecting handle (cutting piece), insert the connecting handle and the tension rod together, and place it on the base; then screw the cover plate into the tension rod, tighten the cover plate to firmly fix the protective bushing on the connecting handle cutting piece; finally, install the connecting handle with the protective bushing into the positioning pin, and use the clamping block, clamping bolt and positioning base plate to achieve the positioning and rigid fixation of the connecting handle cutting piece. After the product is fixed, perform water jet cutting on it.

Claims

1. A water jet cutting fixture with a connecting handle, characterized in that: It includes locking screws, base, tension rod, protective bushing, positioning base plate, clamping bolts, positioning pins, clamping blocks and cover plates. The bottom of the tension rod has one end with a threaded hole, which is inserted into the center hole of the base, the locking screw is inserted into the base and the tension rod, the cover plate is inserted into the top thread of the tension rod and tightened to fix the protective bushing, the positioning pin is fixed on the positioning base plate, the clamping bolt is inserted into the clamping block, and the clamping bolt is screwed into the positioning base plate; The cover plate is a circular stepped column structure, and the cylindrical surface with a smaller diameter extends into the connecting handle cutting piece to protect the end surface; the cover plate has a threaded through hole in the middle for connecting the tension rod and fixing the clamp protection bushing; The positioning base plate is a hexagonal plate with 6 threaded through holes evenly distributed on the 6 sides, which are used to connect and fix the positioning base plate to the cutting machine tool; there are 2 threaded through holes distributed on 2 sides, which are used to fix the connecting handle cutting piece; there is a circular sink in the middle of the positioning base plate, which is used to position and fix the connecting handle cutting piece; there are positioning holes on the two branches in the middle of the positioning base plate, which are used to install positioning pins, and cooperate with the positioning pins to achieve precise positioning of the connecting handle cutting piece.

2. A water jet cutting fixture with a connecting handle as claimed in claim 1, characterized in that: The clamping block is a special-shaped structural part with a threaded hole or a through hole in the center. A clamping bolt is inserted into the hole to clamp and fix the connecting handle cutting part.

3. A water jet cutting fixture with a connecting handle as claimed in claim 1, characterized in that: The clamping bolt is a bolt-like structure, which penetrates into the clamping block and the positioning base plate and is used to clamp and fix the connecting handle cutting piece.

4. A water jet cutting fixture with a connecting handle as claimed in claim 1, characterized in that: The positioning pin is a cylindrical stepped pin structure, which penetrates into the positioning base plate and is used to locate the relative position of the connecting handle cutting piece.

5. A water jet cutting fixture with a connecting handle as claimed in claim 1, characterized in that: The protective bushing is a cylindrical tube-like structure made of ceramic or metal, and is sleeved on the non-cutting part of the connecting handle cutting piece to protect the connecting handle and prevent damage to the non-cutting part.

6. A water jet cutting fixture with a connecting handle as claimed in claim 1, characterized in that: The tension rod is a stud-like structure, which is used to connect the base and the cover plate and cooperate with the fixed protective bushing.

7. A water jet cutting fixture with a connecting handle as claimed in claim 1, characterized in that: The base is a cylindrical stepped column structure, and the cylindrical surface with a smaller diameter extends into the connecting handle cutting piece to protect the end surface; the base has a countersunk hole in the middle for connecting and fixing the tension rod in conjunction with a locking screw.

8. A water jet cutting fixture with a connecting handle as claimed in claim 1, characterized in that: The locking screw is a screw-like structure and is used to cooperate with the base to connect and fix the tension rod.

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